Tektronix 2430 Service Manual

Model 2430

1kW Pulse SourceMeter

Service Manual

®

Contains Calibrating and Servicing Information

WARRANTY

Keithley Instruments, Inc. warrants this product to be free from defects in material and workmanship for a
period of 1 year from date of shipment.

Keithley Instruments, Inc. warrants the following items for 90 days from the date of shipment: probes, cables,
rechargeable batteries, diskettes, and documentation.

During the warranty period, we will, at our option, either repair or replace any product that proves to be defective.

To exercise this warranty, write or call your local Keithley representative, or contact Keithley headquarters in
Cleveland, Ohio. You will be given prompt assistance and return instructions. Send the product, transportation
prepaid, to the indicated service facility. Repairs will be made and the product returned, transportation prepaid.
Repaired or replaced products are warranted for the balance of the original warranty period, or at least 90 days.

LIMITATION OF WARRANTY

This warranty does not apply to defects resulting from product modification without Keithley’s express written
consent, or misuse of any product or part. This warranty also does not apply to fuses, software, non-recharge
able batteries, damage from battery leakage, or problems arising from normal wear or failure to follow instruc­tions.

THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUD­ING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE.
THE REMEDIES PROVIDED HEREIN ARE BUYER’S SOLE AND EXCLUSIVE REMEDIES.

NEITHER KEITHLEY INSTRUMENTS, INC. NOR ANY OF ITS EMPLOYEES SHALL BE LIABLE FOR
ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT
OF THE USE OF ITS INSTRUMENTS AND SOFTWARE EVEN IF KEITHLEY INSTRUMENTS, INC.,
HAS BEEN ADVISED IN ADVANCE OF THE POSSIBILITY OF SUCH DAMAGES. SUCH EXCLUDED
DAMAGES SHALL INCLUDE, BUT ARE NOT LIMITED TO: COSTS OF REMOVAL AND INSTALLA
TION, LOSSES SUSTAINED AS THE RESULT OF INJURY TO ANY PERSON, OR DAMAGE TO PROP­ERTY.

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Keithley Instruments, Inc. 28775 Aurora Road • Cleveland, Ohio 44139 • 440-248-0400 • Fax: [phone]

Sales Offices: BELGIUM: Bergensesteenweg 709 • B-1600 Sint-Pieters-Leeuw • 02-363 00 40 • Fax: [phone]

2892

CHINA: Yuan Chen Xin Building, Room 705 • 12 Yumin Road, Dewai, Madian • Beijing 100029 • 8610-6202-2886 • Fax: [phone]-

FINLAND: Tietäjäntie 2 • 02130 Espoo • Phone: [phone] • Fax: [phone]
FRANCE: 3, allée des Garays • 91127 Palaiseau Cédex • 01-64 53 20 20 • Fax: [phone]
GERMANY: Landsberger Strasse 65 • 82110 Germering • 089/84 93 07-40 • Fax: [phone]
GREAT BRITAIN: Unit 2 Commerce Park, Brunel Road • Theale • Berkshire RG7 4AB • 0118 929 7500 • Fax: [phone]
INDIA: Flat 2B, Willocrissa • 14, Rest House Crescent • Bangalore 560 001 • 91-80-509-1320/21 • Fax: [phone]
ITALY: Viale San Gimignano, 38 • 20146 Milano • 02-48 39 16 01 • Fax: [phone]
JAPAN: New Pier Takeshiba North Tower 13F • 11-1, Kaigan 1-chome • Minato-ku, Tokyo 105-0022 • 81-3-5733-7555 • Fax: [phone]
KOREA: 2FL., URI Building • 2-14 Yangjae-Dong • Seocho-Gu, Seoul 137-888 • 82-2-574-7778 • Fax: [phone]
NETHERLANDS: Postbus 559 • 4200 AN Gorinchem • 0183-635333 • Fax: [phone]
SWEDEN: c/o Regus Business Centre • Frosundaviks Allé 15, 4tr • 169 70 Solna • 08-509 04 679 • Fax: [phone]
SWITZERLAND: Kriesbachstrasse 4 • 8600 Dübendorf • 01-821 94 44 • Fax: [phone]

1-888-KEITHLEY (534-8453) • www.keithley.com

TAIWAN: 1FL., 85 Po Ai Street • Hsinchu, Taiwan, R.O.C. • 886-3-572-9077• Fax: [phone]

Model 2430 1kW Pulse SourceMeter

Service Manual

®

©1998, Keithley Instruments, Inc.

All rights reserved.

Cleveland, Ohio, U.S.A.

Third Printing, October 2004

Document Number: 2430-902-01 Rev. C

Manual Print History

The print history shown below lists the printing dates of all Revisions and Addenda created
for this manual. The Revision Level letter increases alphabetically as the manual undergoes sub
sequent updates. Addenda, which are released between Revisions, contain important change in­formation that the user should incorporate immediately into the manual. Addenda are numbered
sequentially. When a new Revision is created, all Addenda associated with the previous Revi
sion of the manual are incorporated into the new Revision of the manual. Each new Revision
includes a revised copy of this print history page.

Revision A (Document Number 2430-902-01) ........................................................ December 1998

Revision B (Document Number 2430-902-01) ................................................................. June 2000

Revision C (Document Number 2430-902-01) ............................................................October 2004

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All Keithley product names are trademarks or registered trademarks of Keithley Instruments, Inc.

Other brand names are trademarks or registered trademarks of their respective holders.

Safety Precautions

The following safety precautions should be observed before using this product and any associated instrumentation. Although
some instruments and accessories would normally be used with non-hazardous voltages, there are situations where hazardous
conditions may be present.

This product is intended for use by qualified personnel who recognize shock hazards and are familiar with the safety precautions
required to avoid possible injury. Read and follow all installation, operation, and maintenance information carefully before us­ing the product. Refer to the manual for complete product specifications.

If the product is used in a manner not specified, the protection provided by the product may be impaired.

The types of product users are:

Responsible body is the individual or group responsible for the use and maintenance of equipment, for ensuring that the equip­ment is operated within its specifications and operating limits, and for ensuring that operators are adequately trained.

Operators use the product for its intended function. They must be trained in electrical safety procedures and proper use of the
instrument. They must be protected from electric shock and contact with hazardous live circuits.

Maintenance personnel perform routine procedures on the product to keep it operating properly, for example, setting the line
voltage or replacing consumable materials. Maintenance procedures are described in the manual. The procedures explicitly state
if the operator may perform them. Otherwise, they should be performed only by service personnel.

Service personnel are trained to work on live circuits, and perform safe installations and repairs of products. Only properly
trained service personnel may perform installation and service procedures.

Keithley products are designed for use with electrical signals that are rated Measurement Category I and Measurement Category
II, as described in the International Electrotechnical Commission (IEC) Standard IEC 60664. Most measurement, control, and
data I/O signals are Measurement Category I and must not be directly connected to mains voltage or to voltage sources with
high transient over-voltages. Measurement Category II connections require protection for high transient over-voltages often as
sociated with local AC mains connections. Assume all measurement, control, and data I/O connections are for connection to
Category I sources unless otherwise marked or described in the Manual.

Exercise extreme caution when a shock hazard is present. Lethal voltage may be present on cable connector jacks or test fixtures.
The American National Standards Institute (ANSI) states that a shock hazard exists when voltage levels greater than 30V RMS,

42.4V peak, or 60VDC are present. A good safety practice is to expect that hazardous voltage is present in any unknown

circuit before measuring.

Operators of this product must be protected from electric shock at all times. The responsible body must ensure that operators
are prevented access and/or insulated from every connection point. In some cases, connections must be exposed to potential
human contact. Product operators in these circumstances must be trained to protect themselves from the risk of electric shock.
If the circuit is capable of operating at or above 1000 volts, no conductive part of the circuit may be exposed.

Do not connect switching cards directly to unlimited power circuits. They are intended to be used with impedance limited sourc­es. NEVER connect switching cards directly to AC mains. When connecting sources to switching cards, install protective de­vices to limit fault current and voltage to the card.

Before operating an instrument, make sure the line cord is connected to a properly grounded power receptacle. Inspect the con­necting cables, test leads, and jumpers for possible wear, cracks, or breaks before each use.

When installing equipment where access to the main power cord is restricted, such as rack mounting, a separate main input pow­er disconnect device must be provided, in close proximity to the equipment and within easy reach of the operator.

For maximum safety, do not touch the product, test cables, or any other instruments while power is applied to the circuit under
test. ALWAYS remove power from the entire test system and discharge any capacitors before: connecting or disconnecting ca

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5/03

bles or jumpers, installing or removing switching cards, or making internal changes, such as installing or removing jumpers.

Do not touch any object that could provide a current path to the common side of the circuit under test or power line (earth) ground. Al­ways make measurements with dry hands while standing on a dry, insulated surface capable of withstanding the voltage being measured.

The instrument and accessories must be used in accordance with its specifications and operating instructions or the safety of the
equipment may be impaired.

Do not exceed the maximum signal levels of the instruments and accessories, as defined in the specifications and operating in­formation, and as shown on the instrument or test fixture panels, or switching card.

When fuses are used in a product, replace with same type and rating for continued protection against fire hazard.

Chassis connections must only be used as shield connections for measuring circuits, NOT as safety earth ground connections.

If you are using a test fixture, keep the lid closed while power is applied to the device under test. Safe operation requires the use
of a lid interlock.

If a screw is present, connect it to safety earth ground using the wire recommended in the user documentation.

The ! symbol on an instrument indicates that the user should refer to the operating instructions located in the manual.

The symbol on an instrument shows that it can source or measure 1000 volts or more, including the combined effect of
normal and common mode voltages. Use standard safety precautions to avoid personal contact with these voltages.

The symbol indicates a connection terminal to the equipment frame.

The WARNING heading in a manual explains dangers that might result in personal injury or death. Always read the associated
information very carefully before performing the indicated procedure.

The CAUTION heading in a manual explains hazards that could damage the instrument. Such damage may invalidate the war­ranty.

Instrumentation and accessories shall not be connected to humans.

Before performing any maintenance, disconnect the line cord and all test cables.

To maintain protection from electric shock and fire, replacement components in mains circuits, including the power transformer,
test leads, and input jacks, must be purchased from Keithley Instruments. Standard fuses, with applicable national safety ap­provals, may be used if the rating and type are the same. Other components that are not safety related may be purchased from
other suppliers as long as they are equivalent to the original component. (Note that selected parts should be purchased only
through Keithley Instruments to maintain accuracy and functionality of the product.) If you are unsure about the applicability
of a replacement component, call a Keithley Instruments office for information.

To clean an instrument, use a damp cloth or mild, water based cleaner. Clean the exterior of the instrument only. Do not apply
cleaner directly to the instrument or allow liquids to enter or spill on the instrument. Products that consist of a circuit board with
no case or chassis (e.g., data acquisition board for installation into a computer) should never require cleaning if handled accord­ing to instructions. If the board becomes contaminated and operation is affected, the board should be returned to the factory for
proper cleaning/servicing.

Table of Contents

1 Performance Verification

Introduction ................................................................................ 1-2

Verification test requirements .................................................... 1-2

Environmental conditions ................................................... 1-2

Warm-up period .................................................................. 1-2

Line power .......................................................................... 1-3

Recommended test equipment ................................................... 1-3

1Ω resistor characterization ................................................ 1-4

Verification limits ...................................................................... 1-4

Example limits calculation .................................................. 1-4

Resistance limits calculation ............................................... 1-4

Restoring factory defaults .......................................................... 1-5

Performing the verification test procedures ............................... 1-5

Test summary ...................................................................... 1-5

Test considerations ............................................................. 1-5

Setting the source range and output value .......................... 1-6

Setting the measurement range ........................................... 1-6

Compliance considerations ........................................................ 1-7

Compliance limits ............................................................... 1-7

Types of compliance ........................................................... 1-7

Maximum compliance values ............................................. 1-7

Determining compliance limit ............................................ 1-8

Taking the SourceMeter out of compliance ........................ 1-8

Output voltage accuracy ............................................................. 1-8

Voltage measurement accuracy ................................................. 1-9

Output current accuracy ........................................................... 1-10

Current measurement accuracy ................................................ 1-13

Resistance measurement accuracy ........................................... 1-14

2 Calibration

Introduction ................................................................................ 2-2

Environmental conditions .......................................................... 2-2

Temperature and relative humidity ..................................... 2-2

Warm-up period .................................................................. 2-2

Line power .......................................................................... 2-2

Calibration considerations .......................................................... 2-2

Calibration cycle ................................................................. 2-3

Recommended calibration equipment ................................ 2-3

1Ω resistor characterization ................................................ 2-4

Unlocking calibration ................................................................. 2-4

Unlocking calibration from the front panel ........................ 2-4

Unlocking calibration by remote ........................................ 2-5

Changing the password ............................................................... 2-5

Changing the password from the front panel ...................... 2-6

Changing the password by remote ...................................... 2-6

Resetting the calibration password ............................................. 2-6

Viewing calibration dates and calibration count ........................ 2-7

Calibration errors ........................................................................ 2-7

Front panel error reporting .................................................. 2-7

Remote error reporting ........................................................ 2-7

Front panel calibration ................................................................ 2-7

Remote calibration .................................................................... 2-15

Remote calibration commands .......................................... 2-15

Recommended calibration parameters .............................. 2-16

Remote calibration procedure ........................................... 2-18

Single-range calibration ............................................................ 2-23

3 Routine Maintenance

Introduction ................................................................................ 3-2

Line fuse replacement ................................................................. 3-2

4 Troubleshooting

Introduction ................................................................................ 4-2

Safety considerations .................................................................. 4-2

Repair considerations ................................................................. 4-2

Power-on self-test ....................................................................... 4-3

Front panel tests .......................................................................... 4-3

KEYS test ............................................................................ 4-3

DISPLAY PATTERNS test ................................................ 4-3

CHAR SET test ................................................................... 4-4

Principles of operation ................................................................ 4-4

Overall block diagram ......................................................... 4-5

Analog circuits .................................................................... 4-6

Power supply ....................................................................... 4-7

Output stage ......................................................................... 4-7

A/D converter ...................................................................... 4-9

Active guard ........................................................................ 4-9

Digital circuitry ................................................................... 4-9

Display board circuit theory .............................................. 4-10

Troubleshooting ........................................................................ 4-11

Display board checks ........................................................ 4-11

Power supply checks ......................................................... 4-12

Digital circuitry checks ..................................................... 4-12

Analog circuitry checks ..................................................... 4-13

Battery replacement ................................................................. 4-13

Battery replacement precautions ....................................... 4-13

Battery replacement procedure ......................................... 4-14

No comm link error .................................................................. 4-14

5 Disassembly

Introduction ................................................................................ 5-2

Handling and cleaning ............................................................... 5-2

Handling PC boards ............................................................ 5-2

Solder repairs ...................................................................... 5-2

Static sensitive devices ............................................................... 5-3

Assembly drawings .................................................................... 5-3

Case cover removal .................................................................... 5-3

Analog board removal ................................................................ 5-4

Digital board removal ................................................................ 5-5

Front panel disassembly ............................................................. 5-6

Removing power components .................................................... 5-6

Power module removal ....................................................... 5-6

Instrument re-assembly .............................................................. 5-7

6 Replacement Parts

Introduction ................................................................................ 6-2

Parts lists .................................................................................... 6-2

Ordering information ................................................................. 6-2

Factory service ........................................................................... 6-2

Component layouts .................................................................... 6-2

A Specifications

Accuracy calculations ............................................................. A-11

Measurement accuracy .................................................... A-11

Source accuracy ............................................................... A-11

B Command Reference

Introduction ............................................................................... B-2

Command summary .................................................................. B-2

Miscellaneous commands ......................................................... B-3

:CODE ............................................................................... B-3

:COUNT? ........................................................................... B-3

:LOCK ............................................................................... B-3

:SAVE ................................................................................ B-4

:DATE ................................................................................ B-4

:NDUE ............................................................................... B-5

:SENSE .............................................................................. B-5

:SOURCE ........................................................................... B-6

:DATA? ............................................................................. B-8

Detecting calibration errors ....................................................... B-8

Reading the error queue ..................................................... B-8

Error summary .................................................................... B-8

Status byte EAV (Error Available) bit ............................... B-9

Generating an SRQ on error ............................................... B-9

Detecting calibration step completion ..................................... B-10

Using the *OPC? query .................................................... B-10

Using the *OPC command ............................................... B-10

Generating an SRQ on calibration complete .................... B-11

C Calibration Programs

Introduction ............................................................................... C-2

Computer hardware requirements ............................................. C-2

Software requirements ............................................................... C-2

Calibration equipment ............................................................... C-2

General program instructions .................................................... C-2

Program C-1 Model 2430 calibration program .................. C-4

Requesting calibration constants ............................................... C-7

Program C-2 Requesting calibration constants .................. C-7

List of Illustrations

1 Performance Verification

Figure 1-1 Connections for voltage verification tests .................................. 1-9

Figure 1-2 Connections for 10µA to 1A range current verification tests .. 1-11

Figure 1-3 Connections for 3A range current verification tests ................ 1-12

Figure 1-4 Connections for resistance accuracy verification ..................... 1-15

2 Calibration

Figure 2-1 Voltage calibration test connections .......................................... 2-8

Figure 2-2 10µA to 1A range current calibration test connections ............ 2-11

Figure 2-3 3A range current calibration test connections .......................... 2-13

3 Routine Maintenance

Figure 3-1 Rear panel .................................................................................. 3-2

4 Troubleshooting

Figure 4-1 Overall block diagram ................................................................ 4-5

Figure 4-2 Analog circuitry block diagram ................................................. 4-6

Figure 4-3 Power supply block diagram ...................................................... 4-7

Figure 4-4 Output stage simplified schematic ............................................. 4-8

Figure 4-5 Digital circuitry block diagram ................................................ 4-10

List of Tables

1 Performance Verification

Table 1-1 Recommended verification equipment ....................................... 1-3

Table 1-2 Maximum compliance values ..................................................... 1-7

Table 1-3 Output voltage accuracy limits ................................................... 1-9

Table 1-4 Voltage measurement accuracy limits ...................................... 1-10

Table 1-5 Output current accuracy limits ................................................. 1-12

Table 1-6 Current measurement accuracy limits ...................................... 1-14

Table 1-7 Ohms measurement accuracy limits ......................................... 1-16

2 Calibration

Table 2-1 Recommended calibration equipment ........................................ 2-3

Table 2-2 Calibration unlocked states ......................................................... 2-5

Table 2-3 Front panel voltage calibration ................................................. 2-10

Table 2-4 Front panel current calibration ................................................. 2-14

Table 2-5 Remote calibration command summary ................................... 2-16

Table 2-6 Recommended :CALibration:PROTected:SENse

Table 2-7 Recommended :CALibration:PROTected:SOURce

Table 2-8 Voltage calibration initialization commands .............................2-19

Table 2-9 Voltage range calibration commands ....................................... 2-20

Table 2-10 Current calibration initialization commands ............................ 2-21

Table 2-11 Current range calibration commands ........................................ 2-22

parameter ranges ........................................................ 2-17

parameter ranges ........................................................ 2-17

3 Routine Maintenance

Table 3-1 Power line fuse ........................................................................... 3-3

4 Troubleshooting

Table 4-1 Display board checks ................................................................ 4-11

Table 4-2 Power supply checks ................................................................ 4-12

Table 4-3 Digital circuitry checks ............................................................. 4-12

Table 4-4 Analog circuitry checks ............................................................ 4-13

6 Replaceable Parts

Table 6-1 Analog board parts list ................................................................ 6-3

Table 6-2 Digital board parts list .............................................................. 6-13

Table 6-3 Display board parts list ............................................................. 6-19

Table 6-4 Pulse board parts list ................................................................. 6-20

Table 6-5 Mechanical parts list ................................................................. 6-21

B Command Reference

Table B-1 Remote calibration command summary ................................... B-2

Table B-2 Recommended :CALibration:PROTected:SENSe

parameter ranges ......................................................... B-6

Table B-3 Recommended:CALibration:PROTected:SOURce

parameter ranges ......................................................... B-7

Table B-4 Calibration errors ...................................................................... B-9

1

Performance

Verification

1-2 Performance Verification

Introduction

Use the procedures in this section to verify that Model 2430 accuracy is within the limits stated
in the instrument’s one-year accuracy specifications. You can perform these verification proce
dures:

• When you first receive the instrument to make sure that it was not damaged during shipment.

• To verify that the unit meets factory specifications.

• To determine if calibration is required.

• Following calibration to make sure it was performed properly.

WARNING The information in this section is intended for qualified service personnel

NOTE If the instrument is still under warranty and its performance is outside specified limits, con-

tact your Keithley representative or the factory to determine the correct course of action.

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only. Do not attempt these procedures unless you are qualified to do so.
Some of these procedures may expose you to hazardous voltages, which
could cause personal injury or death if contacted. Use standard safety pre
cautions when working with hazardous voltages.

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Verification test requirements

Be sure that you perform the verification tests:

• Under the proper environmental conditions.

• After the specified warm-up period.

• Using the correct line voltage.

• Using the proper test equipment.

• Using the specified output signals and reading limits.

Environmental conditions

Conduct your performance verification procedures in a test environment with:

• An ambient temperature of 18 to 28°C (65 to 82°F).

• A relative humidity of less than 70% unless otherwise noted.

Warm-up period

Allow the Model 2430 to warm up for at least one hour before conducting the verification
procedures.

If the instrument has been subjected to temperature extremes (those outside the ranges stated
above), allow additional time for the instrument’s internal temperature to stabilize. Typically,
allow one extra hour to stabilize a unit that is 10°C (18°F) outside the specified temperature
range.

Also, allow the test equipment to warm up for the minimum time specified by the manufactur-

er.

Line power

The Model 2430 requires a line voltage of 100 to 240V and a line frequency of 50 or 60Hz.

Verification tests must be performed within this range.

Recommended test equipment

Table 1-1 summarizes recommended verification equipment. You can use alternate equipment
as long as that equipment has specifications comparable to those listed in Table 1-1. Keep in mind,
however, that test equipment uncertainty will add to the uncertainty of each measurement. Gener
ally, test equipment uncertainty should be at least four times better than corresponding Model 2430
specifications. Table 1-1 lists the specifications of the recommended test equipment, including
maximum allowable uncertainty for alternate test equipment (shown in parentheses).

Table 1-1

Recommended verification equipment

Performance Verification 1-3

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Description Manufacturer/Model Specifications

Digital Multimeter Hewlett Packard

HP3458A

Resistance Calibrator Fluke 5450A Resistance

Precision Resistor

1. 90-day, full-range accuracy specifications of ranges required for various measurement points.

2. 90-day, ±5°C specifications of nominal resistance values shown. Use actual values for tests. Maximum uncertainty of alter­nate test equipment shown in parentheses.

3. Required for verification of 3A current range. Characterize resistor to ±300ppm or better using recommended DMM
before verifying 3A current measurement range.

3

Isotec RUG-Z-1R00-0.1 1Ω, ±0.1%, 100W

DC Voltage11V:

10V:
100V:

DC Current210μA:

100μA:
1mA:
10mA:
100mA:
1A:

2

1.9Ω:
19Ω:
190Ω:

1.9kΩ:
19kΩ:
190kΩ:

1.9MΩ:
19MΩ:

±5.6ppm
±4.3ppm
±6.3ppm

±25ppm
±23ppm
±20ppm
±20ppm
±35ppm
±110ppm

±65ppm (±460ppm)
±23ppm (±280ppm)
±10.5ppm (±230ppm)
±8ppm (±200ppm)
±7.5ppm (±195ppm)
±8.5ppm (±200ppm)
±11.5ppm (±180ppm)
±30ppm (±635ppm)

1-4 Performance Verification

1Ω resistor characterization

The recommended 1Ω resistor should be characterized to ±300ppm or better before verifying
the 3A current measurement range. (You need not characterize the resistor if you are checking
only the 3A current source range.) Use the 4-wire ohms function of the DMM recommended in
Table 1-1 to measure the resistance value. Then use that measured value to calculate the current
during the 3A current measurement range test procedure.

Verification limits

The verification limits stated in this section have been calculated using only the Model 2430
one-year accuracy specifications, and they do not include test equipment uncertainty. If a par
ticular measurement falls outside the allowable range, recalculate new limits based on Model
2430 specifications and corresponding test equipment specifications.

Example limits calculation

As an example of how verification limits are calculated, assume you are testing the 20V DC
output range using a 20V output value. Using the Model 2430 20V range one-year accuracy
specification of ±(0.02% of output + 2.4mV offset), the calculated output limits are:

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Output limits = 20V ± [(20V × 0.02%) + 2.4mV]

Output limits = 20V ± (0.004 + 0.0024)

Output limits = 20V ± 0.0064V

Output limits = 19.9936V to 20.0064V

Resistance limits calculation

When verifying the resistance measurement accuracy, it will probably be necessary to recal­culate resistance limits based on the actual calibrator resistance values. You can calculate resis­tance reading limits in the same manner described above, but be sure to use the actual calibrator
resistance values and the Model 2430 normal accuracy specifications for your calculations.

As an example, assume you are testing the 20kΩ range, and that the actual value of the nom­inal 19kΩ calibrator resistor is 19.01kΩ. Using the Model 2430 20kΩ range one-year normal
accuracy specifications of ±(0.006% of reading + 3Ω), the recalculated reading limits are:

Reading limits = 19.01kΩ ± [(19.01kΩ × 0.006%) + 3Ω]

Reading limits = 19.01kΩ ±14.4Ω

Reading limits = 18.996kΩ to 19.0244kΩ

Restoring factory defaults

Before performing the verification procedures, restore the instrument to its factory front pan-

el (bench) defaults as follows:

1. Press the MENU key. The instrument will display the following prompt:

MAIN MENU

SAVESETUP COMMUNICATION CAL

2. Select SAVESETUP, then press ENTER. The unit then displays:

SAVESETUP MENU

GLOBAL SOURCE-MEMORY

3. Select GLOBAL, then press ENTER. The unit then displays:

GLOBAL SETUP MENU

SAVE RESTORE POWERON RESET

4. Select RESET, then press ENTER. The unit displays:

RESET ORIGINAL DFLTS

BENCH GPIB

5. Select BENCH, then press ENTER to restore bench defaults.

Performance Verification 1-5

©

Performing the verification test procedures

Test summary

• DC voltage output accuracy

• DC voltage measurement accuracy

• DC current output accuracy

• DC current measurement accuracy

• Resistance measurement accuracy

If the Model 2430 is not within specifications and not under warranty, see the calibration pro-

cedures in Section 2 for information on calibrating the unit.

Test considerations

When performing the verification procedures:

• Be sure to restore factory front panel defaults as previously outlined.

• Make sure that the test equipment is properly warmed up and connected to the Model
2430 INPUT/OUTPUT jacks. Also be sure that the front panel jacks are selected with
the TERMINALS key.

1-6 Performance Verification

• Make sure the Model 2430 is set to the correct source range (see below).

• Ensure that the Model 2430 output is turned on before making measurements.

• Ensure the test equipment is set up for the proper function and range.

• Allow the Model 2430 output signal to settle before making a measurement.

• Do not connect test equipment to the Model 2430 through a scanner, multiplexer, or
other switching equipment.

WARNING The maximum common-mode voltage (voltage between LO and chassis

CAUTION The maximum voltage between INPUT/OUTPUT HI and LO or 4-WIRE

Setting the source range and output value

Before testing each verification point, you must properly set the source range and output val-

ue as outlined below.

ground) is 250V peak. Exceeding this value may cause a breakdown in
insulation, creating a shock hazard.

SENSE HI and LO is 125V peak. The maximum voltage between INPUT/
OUTPUT HI and 4-WIRE SENSE HI or between INPUT/OUTPUT LO
and 4-WIRE SENSE LO is 5V. Exceeding these voltage values may result
in instrument damage.

1. Press either the SOURCE V or SOURCE I key to select the appropriate source function.

2. Press the EDIT key as required to select the source display field. Note that the cursor will flash in the source field while its value is being edited.

3. With the cursor in the source display field flashing, set the source range to the lowest
possible range for the value to be sourced using the up or down RANGE key. For exam
ple, you should use the 20V source range to output a 20V source value. With a 20V
source value and the 20V range selected, the source field display will appear as follows:

Vsrc:+20.0000 V

4. With the source field cursor flashing, set the source output to the required value using either:

• The SOURCE adjustment and left and right arrow keys.

• The numeric keys.

5. Note that the source output value will be updated immediately; you need not press ENTER when setting the source value.

Setting the measurement range

When simultaneously sourcing and measuring either voltage or current, the measure range is
coupled to the source range, and you cannot independently control the measure range. Thus, it
is not necessary for you to set the measure range when testing voltage or current measurement
accuracy.

-

Compliance considerations

Compliance limits

When sourcing voltage, you can set the SourceMeter to limit current from 10nA to 3.15A.
Conversely, when sourcing current, you can set the SourceMeter to limit voltage from 0.2mV
to 105V. The SourceMeter output will not exceed the programmed compliance limit.

Types of compliance

There are two types of compliance that can occur: “real” and “range.” Depending on which
value is lower, the output will clamp at either the displayed compliance setting (“real”) or at the
maximum measurement range reading (“range”).

The “real” compliance condition can occur when the compliance setting is less than the high­est possible reading of the measurement range. When in compliance, the source output clamps
at the displayed compliance value. For example, if the compliance voltage is set to 1V and the
measurement range is 2V, the output voltage will clamp (limit) at 1V.

“Range” compliance can occur when the compliance setting is higher than the possible read­ing of the selected measurement range. When in compliance, the source output clamps at the
maximum measurement range reading (not the compliance value). For example, if the compli
ance voltage is set to 1V and the measurement range is 200mV, the output voltage will clamp
(limit) at 210mV.

Performance Verification 1-7

-

Maximum compliance values

The maximum compliance values for the measurement ranges are summarized in Table 1-2.

Table 1-2

Maximum compliance values

Measurement
range

200mV
2V
20V
100V

10μA
100μA
1mA
10mA
100mA
1A
3A

Maximum
compliance value

210mV

2.1V
21V
105V

10.5μA
105 μA

1.05mA

10.5mA
105mA

1.05A

3.15A

1-8 Performance Verification

When the SourceMeter goes into compliance, the “Cmpl” label or the units label (i.e., “mA”)

for the compliance display will flash.

Determining compliance limit

The relationships to determine which compliance is in effect are summarized as follows.

They assume that the measurement function is the same as the compliance function.

• Compliance Setting < Measurement Range = Real Compliance

• Measurement Range < Compliance Setting = Range Compliance

You can determine the compliance that is in effect by comparing the displayed compliance
setting to the present measurement range. If the compliance setting is lower than the maximum
possible reading on the present measurement range, the compliance setting is the compliance
limit. If the compliance setting is higher than the measurement range, the maximum reading on
that measurement range is the compliance limit.

Taking the SourceMeter out of compliance

Verification measurements should not be made when the SourceMeter is in compliance. For
purposes of the verification tests, the SourceMeter can be taken out of compliance by going into
the edit mode and increasing the compliance limit.

NOTE Do not take the unit out of compliance by decreasing the source value or changing

the range. Always use the recommended range and source settings when performing
the verification tests.

Output voltage accuracy

Follow the steps below to verify that Model 2430 output voltage accuracy is within specified
limits. This test involves setting the output voltage to each full-range value and measuring the
voltages with a precision digital multimeter.

1. With the power off, connect the digital multimeter to the Model 2430 INPUT/OUTPUT jacks, as shown in Figure 1-1.

2. Select the multimeter DC volts measuring function.

3. Press the Model 2430 SOURCE V key to source voltage, and make sure the source out­put is turned on.

Fi

gure 1-

1

Connections for voltage
verification tests

Performance Verification 1-9

4- WIRE

INPUT/

SENSE

OUTPUT

HI

125V

125V

5V

PEAK

PEAK

PEAK

®

Ω

230

FILTER

89

STORE

2430 1KW PULSE SourceMeter

SOURCE

FCTN

I

V

4

5

EDIT

TRIG

SWEEP

LIMIT

+/-

EXIT ENTER

RECALL

CONFIG MENU

MEAS

EDIT

V

I

DISPLAY

1

TOGGLE

LOCAL

REL

POWER

67

DIGITS SPEED

LO

250V
PEAK

!

RANGE

AUTO

TERMINALS

ON/OFF

FRONT/

RANGE

REAR

OUTPUT

Model 2430

Input HI

Input LO

Digital Multimeter

4. Verify output voltage accuracy for each of the voltages listed in Table 1-3. For each test point:

• Select the correct source range.

• Set the Model 2430 output voltage to the indicated value.

• Verify that the multimeter reading is within the limits given in the table.

5. Repeat the procedure for negative output voltages with the same magnitudes as those listed in Table 1-3.

6. Repeat the entire procedure using the rear panel INPUT/OUTPUT jacks. Be sure to select the rear panel jacks with the front panel TERMINALS key.

Table 1-3

Output voltage accuracy limits

Model 2430
source range

200mV
2V
20V
100V

Model 2430 output
voltage setting

200.000mV

2.00000V

20.0000V

100.000V

Output voltage limits
(1 year, 18°C to 28°C)

199.360 to 200.640mV

1.99900 to 2.00100V

19.9936 to 20.0064V

99.968 to 100.032V

Voltage measurement accuracy

Follow the steps below to verify that Model 2430 voltage measurement accuracy is within
specified limits. The test involves setting the source voltage to full-range values, as measured
by a precision digital multimeter, and then verifying that the Model 2430 voltage readings are
within required limits.

1. With the power off, connect the digital multimeter to the Model 2430 INPUT/OUTPUT jacks, as shown in Figure 1-1.

1-10 Performance Verification

2. Select the multimeter DC volts function.

3. Set the Model 2430 to both source and measure voltage by pressing the SOURCE V and MEAS V keys, and make sure the source output is turned on.

4. Verify output voltage accuracy for each of the voltages listed in Table 1-4. For each test point:

• Select the correct source range.

• Set the Model 2430 output voltage to the indicated value as measured by the digital

multimeter.

• Verify that the Model 2430 voltage reading is within the limits given in the table.

NOTE It may not be possible to set the voltage source to the specified value. Use the closest

possible setting, and modify reading limits accordingly.

5. Repeat the procedure for negative source voltages with the same magnitudes as those listed in Table 1-4.

6. Repeat the entire procedure using the rear panel INPUT/OUTPUT jacks. Be sure to select the rear panel jacks with the front panel TERMINALS key.

Table 1-4

Voltage measurement accuracy limits

Model 2430 source
and measure range

200mV
2V
20V
100V

1. Measure range coupled to source range when simultaneously sourcing and measuring voltage.

2. As measured by multimeter. Use closest possible value and modify reading limits accordingly.

1

Source voltage

200.000mV

2.00000V

20.0000V

100.000V

Output current accuracy

Follow the steps below to verify that Model 2430 output current accuracy is within specified
limits. The test involves setting the output current to each full-range value and measuring the
currents with a precision digital multimeter.

10μA to 1A range accuracy

1. With the power off, connect the digital multimeter to the Model 2430 INPUT/OUTPUT jacks, as shown in Figure 1-2.

2

Model 2430 voltage reading
limits (1 year, 18°C to 28°C)

199.676 to 200.324mV

1.99946 to 2.00054V

19.9960 to 20.0040V

99.980 to 100.020V

Fi

gure 1-

2

Connections for 10μA
to 1A range current
verification tests

Performance Verification 1-11

4- WIRE

INPUT/

SENSE

OUTPUT

HI

125V

125V

5V

PEAK

PEAK

PEAK

®

Ω

FILTER

STORE

FCTN

230

LIMIT

89

RECALL

V

4

TRIG

+/-

CONFIG MENU

SWEEP

2430 1KW PULSE SourceMeter

SOURCE

I

5

EDIT

EXIT ENTER

MEAS

EDIT

V

I

DISPLAY

1

TOGGLE

LOCAL

REL

POWER

67

DIGITS SPEED

LO

250V
PEAK

!

RANGE

AUTO

TERMINALS

ON/OFF

FRONT/

RANGE

REAR

OUTPUT

Model 2430

Input LO

Amps

Digital Multimeter

2. Select the multimeter DC current measuring function.

3. Press the Model 2430 SOURCE I key to source current, and make sure the source output is turned on.

4. Verify output current accuracy for the 10μA-1A range currents listed in Table 1-5. For
each test point:

• Select the correct source range.

• Set the Model 2430 output current to the correct value.

• Verify that the multimeter reading is within the limits given in the table.

5. Repeat the procedure for negative output currents with the same magnitudes as those listed in Table 1-5.

6. Repeat the entire procedure using the rear panel INPUT/OUTPUT jacks. Be sure to select the rear panel jacks with the front panel TERMINALS key.

3A and 10A pulse range accuracy

NOTE Verification of the 3A range confirms 10A pulse range accuracy.

1. With the power off, connect the digital multimeter and the 1Ω resistor to the Model 2430
INPUT/OUTPUT jacks, as shown in Figure 1-3.

2. Select the multimeter DC volts measuring function.

3. Press the Model 2430 SOURCE I key to source current, and make sure the source output is turned on.

Fi

3

1-12 Performance Verification

gure 1-

Connections for
3A range current
verification tests

4- WIRE

INPUT/

SENSE

OUTPUT

HI

125V

125V

5V

PEAK

PEAK

PEAK

®

Ω

FILTER

STORE

FCTN

230

LIMIT

89

RECALL

V

4

TRIG

+/-

CONFIG MENU

SWEEP

2430 1KW PULSE SourceMeter

SOURCE

I

5

EDIT

EXIT ENTER

MEAS

EDIT

V

I

DISPLAY

1

TOGGLE

LOCAL

REL

POWER

67

DIGITS SPEED

LO

250V
PEAK

!

RANGE

AUTO

TERMINALS

ON/OFF

FRONT/

RANGE

REAR

OUTPUT

1Ω Resistor

Model 2430

Input HI

Input LO

Digital Multimeter

4. Verify output current accuracy for the 3A range. Be sure to:

• Select the 3A source range.

• Set the Model 2430 output current to the correct 3A output value.

• Verify that the multimeter reading is within the 3A range limits given in Table 1-5.
(Since the value of the 1Ω resistor value is assumed to be the same as its nominal
value, the DMM voltage reading is the same as the sourced current.)

5. Repeat the procedure for a negative 3A current output value.

6. Repeat the entire procedure using the rear panel INPUT/OUTPUT jacks. Be sure to select the rear panel jacks with the front panel TERMINALS key.

Table 1-5

Output current accuracy limits

Model 2430
source range

10mA
100mA
1mA
10mA
100mA
1A

1

3A

1. See separate procedure for 3A range. DMM voltage reading is same as sourced current.

Model 2430
output current setting

10.0000mA

100.000mA

1.00000mA

10.0000mA

100.000mA

1.00000A

3.00000A

Output current limits
(1 year, 18°C to 28°C)

9.9947 to 10.0053mA

99.949 to 100.051mA

0.99946 to 1.00054mA

9.9935 to 10.0065mA

99.914 to 100.086mA

0.99843 to 1.00157A

2.99543 to 3.00457A

Current measurement accuracy

Follow the steps below to verify that Model 2430 current measurement accuracy is within
specified limits. The procedure involves applying accurate currents from the Model 2430 cur
rent source and then verifying that Model 2430 current measurements are within required limits.

10μA to 1A range accuracy

1. With the power off, connect the digital multimeter to the Model 2430 INPUT/OUTPUT jacks, as shown in Figure 1-2.

2. Select the multimeter DC current function.

3. Set the Model 2430 to both source and measure current by pressing the SOURCE I and MEAS I keys, and make sure the source output is turned on.

4. Verify measure current accuracy for the 10μA-1A range currents listed in Table 1-6. For
each measurement:

• Select the correct source range.

• Set the Model 2430 source output to the correct value as measured by the digital mul-

timeter.

• Verify that the Model 2430 current reading is within the limits given in the table.

NOTE It may not be possible to set the current source to the specified value. Use the closest

possible setting, and modify reading limits accordingly.

Performance Verification 1-13

-

5. Repeat the procedure for negative calibrator currents with the same magnitudes as those listed in Table 1-6.

6. Repeat the entire procedure using the rear panel INPUT/OUTPUT jacks. Be sure to select the rear panel jacks with the front panel TERMINALS key.

3A and 10A pulse range accuracy

NOTE The 1Ω resistor should be characterized to within ±300ppm before verifying the 3A

current measurement range. Use the 4-wire ohms function of the DMM to measure
the resistance value, and then use that measured value to calculate the current during
the measurement procedure. Also note that verification of the 3A range confirms 10A
pulse range accuracy.

1. With the power off, connect the 1Ω resistor and digital multimeter to the Model 2430
INPUT/OUTPUT jacks, as shown in Figure 1-3.

2. Select the multimeter DC volts function.

3. Set the Model 2430 to both source and measure current by pressing the SOURCE I and MEAS I keys, and make sure the source output is turned on.

4. Verify measurement current accuracy for the 3A range as follows:

• Select the 3A source range.

1-14 Performance Verification

• Set the Model 2430 source output to the correct 3A value as measured by the digital
multimeter.

• Note the DMM voltage reading, and then calculate the current from the voltage read­ing and characterized 1Ω resistance value as I = V/R, where V is the DMM voltage
reading and R is the characterized resistance value.

• Verify that the Model 2430 current reading is within the 3A limits given in Table 1-

6.

NOTE It may not be possible to set the current source to the specified 3A value. Use the clos-

est possible setting, and modify reading limits accordingly.

5. Repeat the procedure for a negative 3A current.

6. Repeat the procedure using the rear panel INPUT/OUTPUT jacks. Be sure to select the rear panel jacks with the front panel TERMINALS key.

Table 1-6

Current measurement accuracy limits

Model 2430 source

1

and measure range

10μA
100μA
1mA
10mA
100mA
1A
3A

1. Measure range coupled to source range when simultaneously sourcing and measuring current.

2. As measured by precision digital multimeter. Use closest possible value, and modify reading limits
accordingly if necessary.

3. Current calculated as follows: I = V/R, where V is the DMM voltage reading, and R is the character­ized value of the 1Ω resistor.

Source current

10.00000μA

100.000μA

1.00000mA

10.0000mA

100.000mA

1.00000A

3.00000A

Model 2430 current reading limits

2

(1 year, 18°C to 28°C)

9.9966 to 10.0034μA

99.969 to 100.031μA

0.99967 to 1.00033mA

9.9959 to 10.0041mA

99.939 to 100.061mA

0.99883 to 1.00117A

2.99673 to 3.00327A

Resistance measurement accuracy

Use the following steps to verify that Model 2430 resistance measurement accuracy is within
specified limits. This procedure involves applying accurate resistances from a resistance calibra
tor and then verifying that Model 2430 resistance measurements are within required limits.

3

-

Performance Verification 1-15

CAUTION Before testing the 2Ω and 20Ω ranges, make sure your resistance calibrator

can safely handle the default test currents for those ranges (see Model 2430
and calibrator specifications). If not, use the CONFIG OHMS menu to se
lect the MANUAL source mode, then set the source current to an appro­priate safe value. When using the manual source mode, total resistance
reading uncertainty includes both Source I and Measure V uncertainty
(see specifications), and calculated reading limits should take the addition
al uncertainty into account.

If using the Fluke 5450A resistance calibrator, you cannot use the Auto
Ohms mode of the Model 2430 to verify the 2¾ range. The 1A test current
for the 2¾ range of the Model 2430 will damage the calibrator. On the
Model 2430, use the CONFIG OHMS menu to select the MANUAL source
mode, and then set the source (test) current to 100mA.

1. With the power off, connect the resistance calibrator to the Model 2430 INPUT/ OUTPUT and 4-WIRE SENSE jacks, as shown in Figure 1-4. Be sure to use the 4-wire connections as shown.

-

-

Figure 1-4

Connections for
resistance accuracy
verification

4- WIRE

INPUT/

SENSE

OUTPUT

HI

125V

125V

5V

PEAK

PEAK

PEAK

®

Ω

FILTER

STORE

FCTN

230

LIMIT

89

RECALL

V

4

TRIG

+/-

CONFIG MENU

SWEEP

2430 1KW PULSE SourceMeter

SOURCE

I

EDIT

5

EXIT ENTER

MEAS

EDIT

V

I

DISPLAY

1

TOGGLE

LOCAL

REL

POWER

67

DIGITS SPEED

LO

250V

PEAK

!

RANGE

AUTO

TERMINALS

ON/OFF

FRONT/

RANGE

REAR

OUTPUT

Model 2430

Output HI

Resistance Calibrator

Output LO

2. Select the resistance calibrator external sense mode.

Sense HI

Sense LO

1-16 Performance Verification

3. Configure the Model 2430 ohms function for the 4-wire sense mode as follows:

• Press CONFIG then MEAS Ω. The instrument will display the following:

CONFIG OHMS

SOURCE SENSE-MODE GUARD

• Select SENSE-MODE, then press ENTER. The following will be displayed:

SENSE-MODE

2-WIRE 4-WIRE

• Select 4-WIRE, then press ENTER.

• Press EXIT to return to normal display.

4. Press MEAS Ω to select the ohms measurement function, and make sure the source out-
put is turned on.

5. Verify ohms measurement accuracy for each of the resistance values listed in Table 1-7. For each measurement:

• Set the resistance calibrator output to the nominal resistance or closest available

value.

NOTE It may not be possible to set the resistance calibrator to the specified value. Use the

closest possible setting, and modify reading limits accordingly.

• Select the appropriate ohms measurement range with the RANGE keys.

• Verify that the Model 2430 resistance reading is within the limits given in the table.

©

6. Repeat the entire procedure using the rear panel INPUT/OUTPUT and 4-WIRE SENSE jacks. Be sure to select the rear panel jacks with the front panel TERMINALS key.

Table 1-7

Ohms measurement accuracy limits

Model 2430 resistance reading limits

Model 2430 range Calibrator resistance

2Ω
20Ω
200Ω
2kΩ
20kΩ
200kΩ
2MΩ
20MΩ

1. Nominal resistance values.

2. Reading limits based on Model 2430 normal accuracy specifications and nominal resistance values. If actual
resistance values differ from nominal values shown, recalculate reading limits using actual calibrator resistance
values and Model 2430 normal accuracy specifications. See Verification limits earlier in this section for details.

1.9Ω
19Ω
190Ω

1.9kΩ
19kΩ
190kΩ

1.9MΩ
19MΩ

1

(1 year, 18°C to 28°C)

1.89647 to 1.90353Ω

18.9780 to 19.0220Ω

189.818 to 190.182Ω

1.89837 to 1.90163kΩ

18.9856 to 19.0144kΩ

189.837 to 190.163kΩ

1.89761 to 1.90239MΩ

18.9781 to 19.0219MΩ

2

2

Calibration

2-2 Calibration

Introduction

Use the procedures in this section to calibrate the Model 2430. These procedures require accurate
test equipment to measure precise DC voltages and currents. Calibration can be performed either
from the front panel or by sending SCPI calibration commands over the IEEE-488 bus or RS-232
port with the aid of a computer.

WARNING The information in this section is intended for qualified service personnel

only. Do not attempt these procedures unless you are qualified to do so.
Some of these procedures may expose you to hazardous voltages.

Environmental conditions

Temperature and relative humidity

Conduct the calibration procedures at an ambient temperature of 18 to 28°C (65 to 82°F) with
relative humidity of less than 70% unless otherwise noted.

Warm-up period

Allow the Model 2430 to warm up for at least one hour before performing calibration.

If the instrument has been subjected to temperature extremes (those outside the ranges stated
above), allow additional time for the instrument’s internal temperature to stabilize. Typically,
allow one extra hour to stabilize a unit that is 10°C (18°F) outside the specified temperature
range.

Also, allow the test equipment to warm up for the minimum time specified by the manufacturer.

Line power

Model 2430 requires a line voltage of 100 to 240V at line frequency of 50 or 60Hz. The in­strument must be calibrated while operating from a line voltage within this range.

Calibration considerations

When performing the calibration procedures:

• Ensure that the test equipment is properly warmed up and connected to the Model 2430
front panel INPUT/OUTPUT jacks. Also be certain that the front panel jacks are
selected with the TERMINALS switch.

• Always allow the source signal to settle before calibrating each point.

• Do not connect test equipment to the Model 2430 through a scanner or other switching
equipment.

• If an error occurs during calibration, the Model 2430 will generate an appropriate error
message. See Appendix B for more information.

WARNING The maximum common-mode voltage (voltage between LO and chassis

CAUTION The maximum voltage between INPUT/OUTPUT HI and LO or 4-WIRE

Calibration cycle

Perform calibration at least once a year to ensure the unit meets or exceeds its specifications.

NOTE Calibration constants are stored in volatile memories of the Model 2430, which

are protected by a replaceable battery when power is off. Typical life for the bat
tery is approximately 10 years, but the battery should be replaced if the voltage
drops below 2.5V regardless of age. See Section 4 for battery replacement de
tails.

Calibration 2-3

ground) is 250V peak. Exceeding this value may cause a breakdown in in
sulation, creating a shock hazard.

SENSE HI and LO is 125V peak. The maximum voltage between INPUT/
OUTPUT HI and 4-WIRE SENSE HI or between INPUT/OUTPUT LO
and 4-WIRE SENSE LO is 5V. Exceeding these voltage values may result
in instrument damage.

-

-

-

Recommended calibration equipment

Table 2-1 lists the recommended equipment for the calibration procedures. You can use al­ternate equipment as long as that equipment has specifications comparable to those listed in the
table. For optimum calibration accuracy, test equipment specifications should be at least four
times better than corresponding Model 2430 specifications.

Table 2-1

Recommended calibration equipment

Description Manufacturer/Model Specifications

Digital Multimeter Hewlett Packard

DC Voltage

HP3458A

DC Current

Precision Resistor

1. 90-day, full-range accuracy specifications of ranges required for various measurement points.

2. Necessary for calibration of 3A current range. Resistor must be characterized to ±300ppm or better using recom­mended DMM before calibrating 3A range.

2

Isotec RUG-Z-1R00-0.1 1Ω, ±0.1%, 100W

1

1V:
10V:
100V:

1

10μA:
100μA:
1mA:
10mA:
100mA:
1A:

±5.6ppm
±4.3ppm
±6.3ppm

±25ppm
±23ppm
±20ppm
±20ppm
±35ppm

±110ppm

2-4 Calibration

1Ω resistor characterization

The 1Ω resistor must be characterized to ±300ppm or better before calibrating the 3A current
range. Use the 4-wire ohms function of the DMM recommended in Table 1-1 to measure the
resistance value, and then use that measured value to calculate the current during the 3A current
range calibration procedure.

Unlocking calibration

Before performing calibration, you must first unlock calibration by entering or sending the
calibration password as explained in the following paragraphs.

Unlocking calibration from the front panel

1. Press the MENU key, then choose CAL, and press ENTER. The instrument will display the following:

CALIBRATION

UNLOCK EXECUTE VIEW-DATES
 SAVE LOCK CHANGE-PASSWORD

2. Select UNLOCK, then press ENTER. The instrument will display the following:

PASSWORD:

Use ß, ©, ¹, ƒ, ENTER or EXIT.

3. Use the up and down RANGE keys to select the letter or number, and use the left and
right arrow keys to choose the position. (Press down RANGE for letters; up RANGE for
numbers.) Enter the present password on the display. (Front panel default: 002430.)

4. Once the correct password is displayed, press the ENTER key. If the password was cor­rectly entered, the following message will be displayed:

CALIBRATION UNLOCKED

Calibration can now be executed.

5. Press EXIT to return to normal display. Calibration will be unlocked and assume the
states summarized in Table 2-2. Attempts to change any of the settings listed with cali
bration unlocked will result in an error +510, “Not permitted with cal un-locked.”

©

-

Calibration 2-5

NOTE With calibration unlocked, the sense function and range track the source function and

range. That is, when :SOUR:FUNC is set to VOLT, the :SENS:FUNC setting will be
'VOLT:DC'. When :SOUR:FUNC is set to CURR, the :SENS:FUNC setting will be
'CURR:DC'. A similar command coupling exists for :SOUR:VOLT:RANG/
:SENS:VOLT:RANG and SOUR:CURR:RANG:SENS:CURR:RANG.

Table 2-2

Calibration unlocked states

Mode State Equivalent remote command

Concurrent Functions
Sense Function
Sense Volts NPLC
Sense Volts Range
Sense Current NPLC
Sense Current Range
Filter Count
Filter Control
Filter Averaging
Source V Mode
Volts Autorange
Source I Mode
Current Autorange
Autozero
Trigger Arm Count
Trigger Arm Source
Trigger Count
Trigger Source

OFF
Source

1.0
Source V

1.0
Source I
10
REPEAT
ON
FIXED
OFF
FIXED
OFF
ON
1
Immediate
1
Immediate

Unlocking calibration by remote

To unlock calibration via remote, send the following command:

:CAL:PROT:CODE '<password>'

For example, the following command uses the default password:

:CAL:PROT:CODE 'KI002430'

:SENS:FUNC:CONC OFF
:SENS:FUNC <source_ function>
:SENS:VOLT:NPLC 1.0
:SENS:VOLT:RANG <range>
:SENS:CURR:NPLC 1.0
:SENS:CURR:RANG <range>
:SENS:AVER:COUN 10
:SENS:AVER:TCON REPeat
:SENS:AVER:STAT ON
:SOUR:VOLT:MODE FIXED
:SOUR:VOLT:RANG:AUTO OFF
:SOUR:CURR:MODE FIXED
:SOUR:CURR:RANG:AUTO OFF
:SYST:AZERO ON
:ARM:COUNT 1
:ARM:SOUR IMMediate
:TRIG:COUNT 1
:TRIG:SOUR IMMediate

Changing the password

The default password may be changed from the front panel or via remote as discussed next.

2-6 Calibration

Changing the password from the front panel

Changing the password by remote

Follow the steps below to change the password from the front panel:

1. Press the MENU key, then choose CAL and press ENTER. The instrument will display the following:

CALIBRATION

UNLOCK EXECUTE VIEW-DATES
 SAVE LOCK CHANGE-PASSWORD

2. Select UNLOCK, then enter the password. (Default: 002430.)

3. Select CHANGE-PASSWORD, then press ENTER. The instrument will display the fol­lowing:

New Pwd: 002430

Use ß, ©, ¹, ƒ, ENTER or EXIT.

4. Using the range keys and the left and right arrow keys, enter the new password on the display.

5. Once the desired password is displayed, press the ENTER key to store the new pass­word.

©

To change the calibration password by remote, first send the present password, and then send
the new password. For example, the following command sequence changes the password from
the 'KI002430' remote default to 'KI_CAL':

:CAL:PROT:CODE 'KI002430'

:CAL:PROT:CODE 'KI_CAL'

You can use any combination of letters and numbers up to a maximum of eight characters.

NOTE If you change the first two characters of the password to something other than

“KI”, you will not be able to unlock calibration from the front panel.

Resetting the calibration password

If you lose the calibration password, you can unlock calibration by shorting together the CAL
pads, which are located on the display board. Doing so will also reset the password to the factory
default (KI002430).

See Section 5 for details on disassembling the unit to access the CAL pads. Refer to the dis­play board component layout drawing at the end of Section 6 for the location of the CAL pads.

Calibration 2-7

Viewing calibration dates and calibration count

When calibration is locked, only the UNLOCK and VIEW-DATES selections will be acces-

sible in the calibration menu. To view calibration dates and calibration count at any time:

1. From normal display, press MENU, select CAL, and then press ENTER. The unit will display the following:

CALIBRATION

UNLOCK EXECUTE VIEW-DATES

2. Select VIEW-DATES, then press ENTER. The Model 2430 will display the next and last calibration dates and the calibration count as in the following example:

NEXT CAL: 12/15/1999

Last calibration: 12/15/1999 Count: 0001

©

Calibration errors

The Model 2430 checks for errors after each calibration step, minimizing the possibility that

improper calibration may occur due to operator error.

Front panel error reporting

If an error is detected during comprehensive calibration, the instrument will display an ap­propriate error message (see Appendix B). The unit will then prompt you to repeat the calibra­tion step that caused the error.

Remote error reporting

You can detect errors while in remote by testing the state of EAV (Error Available) bit (bit 2)
in the status byte. (Use the *STB? query to request the status byte.) Query the instrument for the
type of error by using the appropriate :SYST:ERR? query. The Model 2430 will respond with the
error number and a text message describing the nature of the error. See Appendix B for details.

Front panel calibration

The following front panel calibration procedure calibrates all ranges of both the current and
voltage source and measure functions. Note that each range is separately calibrated by repeating
the entire procedure for each range.

Step 1: Prepare the Model 2430 for calibration

1. Turn on the Model 2430 and the digital multimeter, and allow them to warm up for at least one hour before performing calibration.

2-8 Calibration

Figure 2-1

Voltage calibration
test connections

2. Press the MENU key, then choose CAL and press ENTER. Select UNLOCK, and then press ENTER. The instrument will display the following:

PASSWORD:

Use ß, ©, ¹, ƒ, ENTER or EXIT.

3. Use the up and down range keys to select the letter or number, and use the left and right arrow keys to choose the position. Enter the present password on the display. (Front panel default: 002430.) Press ENTER to complete the process.

4. Press EXIT to return to normal display. Instrument operating states will be set as sum­marized in Table 2-2.

Step 2: Voltage calibration

Perform the steps below for each voltage range, using Table 2-3 as a guide.

1. Connect the Model 2430 to the digital multimeter, as shown in Figure 2-1. Select the multimeter DC volts measurement function.

4- WIRE

INPUT/

SENSE

OUTPUT

Ω

230

FILTER

89

STORE

2430 1KW PULSE SourceMeter

SOURCE

FCTN

I

V

4

5

EDIT

TRIG

SWEEP

LIMIT

+/-

EXIT ENTER

RECALL

CONFIG MENU

MEAS

EDIT

V

I

DISPLAY

1

TOGGLE

LOCAL

REL

POWER

67

DIGITS SPEED

HI

125V

125V

5V

PEAK

PEAK

PEAK

®

LO

250V

PEAK

!

RANGE

AUTO

TERMINALS

ON/OFF

FRONT/

RANGE

REAR

OUTPUT

Model 2430

Input HI

Input LO

Digital Multimeter

2. From normal display, press the SOURCE V key.

3. Press the EDIT key to select the source field (cursor flashing in source display field), and then use the down RANGE key to select the 200mV source range.

4. From normal display, press MENU.

5. Select CAL, then press ENTER. The unit will display the following:

CALIBRATION

UNLOCK EXECUTE VIEW-DATES

ß

SAVE LOCK CHANGE-PASSWORD

©

6. Select EXECUTE, then press ENTER. The instrument will display the following message:

V-CAL

Press ENTER to Output +200.00mV

Calibration 2-9

7. Press ENTER. The Model 2430 will source +200mV and simultaneously display the fol­lowing:

DMM RDG: +200.0000mV

Use ß, ©, ¹, ƒ, ENTER or EXIT.

8. Note and record the DMM reading, and then adjust the Model 2430 display to agree
exactly with the actual DMM reading. Use the up and down arrow keys to select the digit
value, and use the left and right arrow keys to choose the digit position (or use the num
ber keys, 0-9, +/-). Note that the display adjustment range is within ±10% of the present
range.

9. After adjusting the display to agree with the DMM reading, press ENTER. The instru­ment will then display the following:

V-CAL
Press ENTER to Output +000.00mV

10. Press ENTER. The Model 2430 will source 0mV and at the same time display the fol­lowing:

DMM RDG: +000.0000mV

Use ß, ©, ¹, ƒ, ENTER or EXIT.

11. Note and record the DMM reading, and then adjust the Model 2430 display to agree with the actual DMM reading. Note that the display value adjustment limits are within ±1% of the present range.

12. After adjusting the display value to agree with the DMM reading, press ENTER. The unit will then display the following:

V-CAL

Press ENTER to Output -200.00mV

13. Press ENTER. The Model 2430 will source -200mV and display the following:

DMM RDG: -200.0000mV

Use ß, ©, ¹, ƒ, ENTER or EXIT.

14. Note and record the DMM reading, and then adjust the Model 2430 display to agree with the DMM reading. Again, the maximum display adjustment is within ±10% of the present range.

15. After adjusting the display value to agree with the DMM reading, press ENTER and note that the instrument displays:

V-CAL

Press ENTER to Output +000.00mV

16. Press ENTER. The Model 2430 will source 0mV and simultaneously display the following:

DMM RDG: +000.0000mV

Use ß, ©, ¹, ƒ, ENTER or EXIT.

17. Note and record the DMM reading, and then adjust the display to agree with the DMM reading. Once again, the maximum adjustment is within ±1% of the present range.

18. After adjusting the display to agree with the DMM reading, press ENTER to complete calibration of the present range.

-

2-10 Calibration

19. Press EXIT to return to normal display, then select the 2V source range. Repeat steps 2 through 18 for the 2V range.

20. After calibrating the 2V range, repeat the entire procedure for the 20V and 100V ranges using Table 2-3 as a guide. Be sure to select the appropriate source range with the EDIT and RANGE keys before calibrating each range.

21. Press EXIT as necessary to return to normal display.

Table 2-3

Front panel voltage calibration

Source
range

1

Source voltage Multimeter voltage reading

2

0.2V +200.00mV
+000.00mV

-200.00mV
+000.00mV

+2.0000V

2V

+0.0000V

-2.0000V
+0.0000V

+20.000V

20V

+00.000V

-20.000V
+00.000V

+100.00V

100V

+000.00V

-100.00V
+000.00V

1. Use EDIT and RANGE keys to select source range.

2. Multimeter reading used in corresponding calibration step. See procedure.

___________ mV
___________ mV
___________ mV
___________ mV

___________ V
___________ V
___________ V
___________ V

___________ V
___________ V
___________ V
___________ V

___________ V
___________ V
___________ V
___________ V

Step 3: Current calibration

Perform the following steps for each current range, using Table 2-4 as a guide.

1. Connect the Model 2430 to the digital multimeter, as shown in Figure 2-2. Select the multimeter DC current measurement function.

Figure 2-2

10μA to 1A range
current calibration
test connections

Calibration 2-11

4- WIRE

INPUT/

SENSE

OUTPUT

HI

125V

125V

5V

PEAK

PEAK

PEAK

®

Ω

230

FILTER

89

STORE

2430 1KW PULSE SourceMeter

SOURCE

FCTN

I

V

4

5

EDIT

TRIG

SWEEP

LIMIT

+/-

EXIT ENTER

RECALL

CONFIG MENU

MEAS

EDIT

V

I

DISPLAY

1

TOGGLE

LOCAL

REL

POWER

67

DIGITS SPEED

LO

250V
PEAK

!

RANGE

AUTO

TERMINALS

ON/OFF

FRONT/

RANGE

REAR

OUTPUT

Model 2430

Input LO

Digital Multimeter

Amps

2. From normal display, press the SOURCE I key.

3. Press the EDIT key to select the source display field, and then use the down RANGE
key to select the 10μA source range.

4. From normal display, press MENU.

5. Select CAL, and then press ENTER. The unit will display the following:

CALIBRATION

UNLOCK EXECUTE VIEW-DATES

ß

SAVE LOCK CHANGE-PASSWORD

©

6. Select EXECUTE, then press ENTER. The instrument will display the following message:

I-CAL

Press ENTER to Output +10.000μA

7. Press ENTER. The Model 2430 will source +10μA and simultaneously display the
following:

DMM RDG: +10.00000μA
Use ß, ©, ¹, ƒ, ENTER or EXIT.

8. Note and record the DMM reading, and then adjust the Model 2430 display to agree
exactly with the actual DMM reading. Use the up and down arrow keys to select the digit
value, and use the left and right arrow keys to choose the digit position (or use the num
ber keys, 0-9, +/-). Note that the display adjustment range is within ±10% of the present
range.

9. After adjusting the display to agree with the DMM reading, press ENTER. The instru­ment will then display the following:

I-CAL

Press ENTER to Output +00.000μA

-

2-12 Calibration

10. Press ENTER. The Model 2430 will source 0mA and at the same time display the fol­lowing:

DMM RDG: +00.00000μA

Use ß, ©, ¹, ƒ, ENTER or EXIT.

11. Note and record the DMM reading, and then adjust the Model 2430 display to agree with the actual DMM reading. Note that the display value adjustment limits are within ±1% of the present range.

12. After adjusting the display value to agree with the DMM reading, press ENTER. The unit will then display the following:

I-CAL

Press ENTER to Output -10.000μA

13. Press ENTER. The Model 2430 will source -10μA and display the following:

DMM RDG: -10.00000μA

Use ß, ©, ¹, ƒ, ENTER or EXIT.

14. Note and record the DMM reading, and then adjust the Model 2430 display to agree with the DMM reading. Again, the maximum display adjustment is within ±10% of the present range.

15. After adjusting the display value to agree with the DMM reading, press ENTER and note that the instrument displays:

I-CAL

Press ENTER to Output +00.000μA

16. Press ENTER The Model 2430 will source 0μA and simultaneously display the follow­ing:

DMM RDG: +00.00000μA

Use ß, ©, ¹, ƒ, ENTER or EXIT.

17. Note and record the DMM reading, and then adjust the display to agree with the DMM reading. Once again, the maximum adjustment is within ±1% of the present range.

18. After adjusting the display to agree with the DMM reading, press ENTER to complete calibration of the present range.

19. Press EXIT to return to the normal display, and then select the 100μA source range using
the EDIT and up RANGE keys. Repeat steps 2 through 18 for the 100μA range.

20. After calibrating the 100μA range, repeat the entire procedure for the 1mA through 1A
ranges using Table 2-4 as a guide. Be sure to select the appropriate source range with the
EDIT and up RANGE keys before calibrating each range.

21. After calibrating the 1A range, connect the 1Ω characterized resistor and DMM to the
Model 2430 INPUT/OUTPUT jacks, as shown in Figure 2-3.

22. Select the DMM DC volts function.

23. Repeat steps 2 through 18 for the 3A range using Table 2-4 as a guide. When entering
the DMM reading, use the calculated current as follows: I = V/R, where V is the DMM
voltage reading, and R is the characterized value of the 1Ω resistor.

Figure 2-3

3A range current
calibration test
connections

Calibration 2-13

4- WIRE

INPUT/

SENSE

OUTPUT

HI

125V

125V

5V

PEAK

PEAK

PEAK

®

Ω

230

FILTER

89

STORE

2430 1KW PULSE SourceMeter

SOURCE

FCTN

I

V

4

5

EDIT

TRIG

SWEEP

LIMIT

+/-

EXIT ENTER

RECALL

CONFIG MENU

MEAS

EDIT

V

I

DISPLAY

1

TOGGLE

LOCAL

REL

POWER

67

DIGITS SPEED

LO

250V
PEAK

!

RANGE

AUTO

TERMINALS

ON/OFF

FRONT/

RANGE

REAR

OUTPUT

1Ω Resistor

Model 2430

Digital Multimeter

Input HI

Input LO

2-14 Calibration

Table 2-4

Front panel current calibration

Source range

1

Source current

10μA +10.000μA

+00.000μA

-10.000μA
+00.000μA

100μA +100.00μA

+000.00μA

-100.00μA
+000.00μA

1mA +1.0000mA

+0.0000mA

-1.0000mA
+0.0000mA

10mA +10.000mA

+00.000mA

-10.000mA
+00.000mA

100mA +100.00mA

+000.00mA

-100.00mA
+000.00mA

1A +1.0000A

+0.0000A

-1.0000A
+0.0000A

3

3A

+3.0000A
+0.0000A

-3.0000A
+0.0000A

1. Use EDIT and RANGE keys to select source range.

2. Multimeter reading used in corresponding calibration step. See procedure.

3. Current calculated as follows: I = V/R, where V is the DMM reading, and R is the
characterized value of the 1Ω resistor. 10A pulse range calibrated simultaneously.

Multimeter
current reading

___________ μA
___________ μA
___________ μA
___________ μA

___________ μA
___________ μA
___________ μA
___________ μA

___________ mA
___________ mA
___________ mA
___________ mA

___________ mA
___________ mA
___________ mA
___________ mA

___________ mA
___________ mA
___________ mA
___________ mA

___________ A
___________ A
___________ A
___________ A

___________ A
___________ A
___________ A
___________ A

2

Step 4: Enter calibration dates and save calibration

NOTE For temporary calibration without saving new calibration constants, proceed to

Step 5: Lock out calibration.

1. From normal display, press MENU.

2. Select CAL, and then press ENTER. The Model 2430 will display the following:

CALIBRATION

UNLOCK EXECUTE VIEW-DATES ©

ß

SAVE LOCK CHANGE-PASSWORD

Calibration 2-15

3. Select SAVE, then press ENTER. The unit will display the following message:

SAVE CAL
Press ENTER to continue; EXIT to abort calibration sequence

4. Press ENTER. The unit will prompt you for the calibration date:

CAL DATE: 12/15/1998

Use ß, ©, ¹, ƒ, ENTER or EXIT.

5. Change the displayed date to today's date, then press the ENTER key. Press ENTER again to confirm the date.

6. The unit will then prompt for the calibration due date:

NEXT CAL: 12/15/1998

Use ß, ©, ¹, ƒ, ENTER or EXIT.

7. Set the calibration due date to the desired value, then press ENTER. Press ENTER again to confirm the date.

8. Once the calibration dates are entered, calibration is complete, and the following mes­sage will be displayed:

CALIBRATION COMPLETE

Press ENTER to confirm; EXIT to abort

9. Press ENTER to save the calibration data (or press EXIT to abort without saving cali­bration data.) The following message will be displayed:

CALIBRATION SUCCESS

Press ENTER or EXIT to continue.

10. Press ENTER or EXIT to complete process.

Step 5: Lock out calibration

1. From normal display, press MENU.

2. Select CAL, then press ENTER. The Model 2430 will display the following:

CALIBRATION

UNLOCK EXECUTE VIEW-DATES

ß

SAVE LOCK CHANGE-PASSWORD

3. Select LOCK, then press ENTER to lock out calibration.

Remote calibration

Use the following procedure to perform remote calibration by sending SCPI commands over
the IEEE-488 bus or RS-232 port. The remote commands and appropriate parameters are sepa
rately summarized for each step.

Remote calibration commands

Table 2-5 summarizes remote calibration commands. For a more complete description of
these commands, refer to Appendix B.

©

-

2-16 Calibration

Table 2-5

Remote calibration command summary

Command Description

:CALibration

:PROTected

:CODE '<password>'

Calibration subsystem.

Cal commands protected by password.

Unlock cal; changes password if cal is already unlocked.

(Default password: KI002430.)
:COUNT?
:SAVE
:LOCK
:LOCK?
:DATE <y>,<m>,<d>
:DATE?
:NDUE <y>,<m>,<d>
:NDUE?
:SENSe <nrf>

:DATA?

:SOURce <nrf>

:DATA?

* Calibration data will not be saved if:

1. Calibration was not unlocked with :CODE command.

2. Invalid data exists. (For example, cal step failed or was aborted.)

3. Incomplete number of cal steps were performed. ( For example, omitting a negative full-scale step.)
Ranges that calibrated successfully will be saved if calibration is unlocked. Ranges that failed will not be saved.

Query number of times 2430 has been calibrated.
Save calibration data to EEPROM.*
Lock calibration, inhibit SAVE command operation.
Request cal lock status.
Program calibration year, month, day.
Query calibration year, month, day.
Program calibration due year, month, day.
Query calibration due year, month, day.
Calibrate active measure range. (See Table 2-6 parameters.)

Query measurement cal constants for active range.

Calibrate active source range. (See Table 2-7 parameters.)

Query source cal constants for active range.

Recommended calibration parameters

The maximum calibration command parameter ranges are: 75% to 150% of full scale for pos­itive and negative full scale calibration points; ± zero calibration steps have ±50% of full scale
for valid entry ranges. However, for optimum calibration, it is recommended that you use cali
bration points within the ranges listed in Table 2-6 and Table 2-7. Note that each sense range
requires three parameters: zero, negative full scale, and positive full scale. Similarly, each
source range requires four parameters: two zero parameters, a positive full-scale parameter, and
a negative full-scale parameter.

-

Table 2-6

Recommended :CALibration:PROTected:SENse parameter ranges

Sense
range

0.2V
2V
20V
100V

First parameter
(zero)

-0.002 to +0.002

-0.02 to +0.02

-0.2 to +0.2

-1 to +1

Second parameter
(negative full scale)

-0.18 to -0.22

-1.8 to -2.2

-18 to -22

-90 to -110

Third parameter
(positive full scale)

+0.18 to +0.22
+1.8 to +2.2
+18 to +22
+90 to +110

Calibration 2-17

10μA
100μA
1mA
10mA
100mA
1A
3A

-1E-7 to +1E-7

-1E-6 to +1E-6

-1E-5 to +1E-5

-1E-4 to +1E-4

-1E-3 to +1E-3

-1E-2 to +1E-2

-3E-2 to +3E-2

-9E-6 to -11E-6

-90E-6 to -110E-6

-0.9E-3 to -1.1E-3

-9E-3 to -11E-3

-90E-3 to -110E-3

-0.9 to -1.1

-2.7 to -3.15

+9E-6 to +11E-6
+90E-6 to +110E-6
+0.9E-3 to +1.1E-3
+9E-3 to +11E-3
+90E-3 to +110E-3
+0.9 to +1.1
+2.7 to +3.15

Table 2-7

Recommended :CALibration:PROTected:SOURce parameter ranges

Fourth

First parameter

Source range

0.2V
2V
20V
100V

10μA
100μA
1mA
10mA
100mA
1A
3A

Note: Parameter steps for each range may be performed in any order, but all parameter steps for each range
must be completed. For optimum calibration, use parameters within recommended limits.

(negative full scale)

-0.18 to -0.22

-1.8 to -2.2

-18 to -22

-90 to -110

-9E-6 to -11E-6

-90E-6 to -110E-6

-0.9E-3 to -1.1E-3

-9E-3 to -1E-3

-90E-3 to -110E-3

-0.9 to -1.1

-2.7 to -3.15

Second parameter
(negative zero)

-0.002 to +0.002

-0.02 to +0.02

-0.2 to +0.2

-1 to +1

-1E-7 to +1E-7

-1E-6 to +1E-6

-1E-5 to +1E-5

-1E-4 to +1E-4

-1E-3 to +1E-3

-1E-2 to +1E-2

-3E-2 to +3E-2

Third parameter
(positive full scale)

+0.18 to +0.22
+1.8 to +2.2
+18 to +22
+90 to +110

+9E-6 to +11E-6
+90E-6 to +110E-6
+0.9E-3 to +1.1E-3
+9E-3 to +11E-3
+90E-3 to +110E-3
+0.9 to +1.1
+2.7 to +3.15

parameter
(positive zero)

-0.002 to +0.002

-0.02 to +0.02

-0.2 to +0.2

-1 to +1

-1E-7 to +1E-7

-1E-6 to +1E-6

-1E-5 to +1E-5

-1E-4 to +1E-4

-1E-3 to +1E-3

-1E-2 to +1E-2

-3E-2 to +3E-2

2-18 Calibration

Remote calibration procedure

Step 1: Prepare the Model 2430 for calibration

1. Connect the Model 2430 to the controller IEEE-488 interface or RS-232 port using a shielded interface cable.

2. Turn on the Model 2430 and the test equipment, and allow them to warm up for at least one hour before performing calibration.

3. If you are using the IEEE-488 interface, make sure the primary address of the Model
2430 is the same as the address specified in the program you will be using to send com
mands. (Use the MENU key and the COMMUNICATION menu to access the IEEE-488
address.)

Step 2: Voltage calibration

1. Connect the Model 2430 to the digital multimeter, and select the multimeter DC volts function. (See Figure 1-2).

2. Send the commands summarized in Table 2-8 in the order listed to initialize voltage cal­ibration. (When the :CAL:PROT:CODE command is sent, the instrument will assume
the operating states listed in Table 2-2.)

3. Perform the range calibration steps listed in Table 2-9 for all ranges. For each range:

• Send the :SOUR:VOLT:RANG command to select the source and sense range being

calibrated. For example, for the 2V range, the following command would be sent

:SOUR:VOLT:RANG 2

• Program the source to output the negative full-range value using the :SOUR:VOLT

command. For example:

:SOUR:VOLT -2

• Note and record the multimeter reading.

• Use the multimeter reading as the parameter for the :CAL:PROT:SOUR and

:CAL:PROT:SENS commands. For example, a typical value for the 2V range would
be:

:CAL:PROT:SOUR -1.998
:CAL:PROT:SENS -1.998

• Program the voltage source for 0V output using the :SOUR:VOLT 0.0 command.

• Note the multimeter reading.

• Send the source and sense calibration commands using the multimeter reading for the

parameter. For example:

:CAL:PROT:SOUR1E-3
:CAL:PROT:SENS 1E-3

• Set the source to the positive full-range value using the :SOUR:VOLT command. For

example:

:SOUR:VOLT 2

• Note and record the multimeter reading.

-

Calibration 2-19

• Send the source and sense commands using the multimeter reading as the parameter.
For example:

:CAL:PROT:SOUR 1.997
:CAL:PROT:SENS 1.997

• Send the SOUR:VOLT 0.0 command to set the source voltage to 0V.

• Note and record the multimeter reading.

• Send the :CAL:PROT:SOUR command using the multimeter reading as the com­mand parameter. For example:

:CAL:PROT:SOUR -1.02E-3

Table 2-8

Voltage calibration initialization commands

Command Description

*RST Restore GPIB defaults.
:SOUR:FUNC VOLT Activate voltage source.
:SENS:CURR:PROT 0.1 Current limit when voltage source is active.
:SENS:CURR:RANG 0.1 Make sure 1A range is not active.
:SOUR:VOLT:PROT MAX Maximum allowable source voltage.
:SYST:RSEN OFF Disable remote sensing.
:CAL:PROT:CODE 'KI002430' Unlock cal.
:OUTP:STAT ON Turn source on.

Step 3: Current calibration

1. Connect the Model 2430 to the digital multimeter (Figure 2-2), and select the multimeter DC current function.

2. Send the commands summarized in Table 2-10 in the order listed to initialize current calibration.

2-20 Calibration

Table 2-9

Voltage range calibration commands

Step Command/procedure

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22

1

:SOUR:VOLT:RANGE <Range>
:SOUR:VOLT -<Source_value>
Take DMM reading.

2

:CAL:PROT:SOUR <DMM_Reading>
Check 2430 for errors.

3

:CAL:PROT:SENS <DMM_Reading>
Check 2430 for errors.
:SOUR:VOLT 0.0
Take DMM reading.
:CAL:PROT:SOUR <DMM_Reading>
Check 2430 for errors.
:CAL:PROT:SENS <DMM_Reading>
Check 2430 for errors.
:SOUR:VOLT +<Source_value>
Take DMM reading.
:CAL:PROT:SOUR <DMM_Reading>
Check 2430 for errors.
:CAL:PROT:SENS <DMM_Reading>
Check 2430 for errors.
:SOUR:VOLT 0.0
Take DMM reading.
:CAL:PROT:SOUR <DMM_Reading>

Description

Select source range.
Establish negative full-range polarity.
Read actual output value.
Calibrate sense function negative full scale.

Calibrate source function negative full scale.

Set output to 0V.
Read actual output value.
Calibrate sense function negative zero.

Calibration source function negative zero.

Establish positive full-range polarity.
Read actual output value.
Calibrate sense function positive full scale.

Calibrate source function positive full scale.

Set output to 0V.
Read actual output value.
Calibrate source positive zero.

1. Perform complete procedure for each range, where <Range> = 0.2, 2, 20, and 100, and<Source_value> = 0.2, 2,
20, and 100.

2. <DMM_Reading> parameter is multimeter reading from previous step.

3. Use :SYST:ERR? query to check for errors.

3. Calibrate the 10μA to 1A current ranges using the procedure summarized in Table 2-11.
For each range:

• Send the :SOUR:CURR:RANG command to select the source and sense range
being calibrated. For example, for the 1mA range, the command is:

:SOUR:CURR:RANG 1E-3

• Program the source to output the negative full-range value using the
:SOUR:CURR command. For example:

:SOUR:CURR -1E-3

• Note and record the multimeter reading.

• Use the multimeter reading as the parameter for the :CAL:PROT:SOUR and
:CAL:PROT:SENS commands. For example, a typical value for the 1mA range
would be:

:CAL:PROT:SOUR -1.025E-3
:CAL:PROT:SENS -1.025E-3

Calibration 2-21

• Program the current source for 0A output using the :SOUR:CURR 0.0 command.

• Note the multimeter reading.

• Send the source and sense calibration commands using the multimeter reading for
the parameter. For example:

:CAL:PROT:SOUR 1E-6
:CAL:PROT:SENS 1E-6

• Set the source to the positive full-range value using the :SOUR:CURR command.
For example, for the 1mA range:

:SOUR:CURR 1E-3

• Note and record the multimeter reading.

• Send the source and sense commands using the multimeter reading as the param­eter. For example:

:CAL:PROT:SOUR 1.03E-3
:CAL:PROT:SENS 1.03E-3

• Send the :SOUR:CURR 0.0 command to set the source current to 0A.

• Note and record the multimeter reading.

• Send the :CAL:PROT:SOUR command using the multimeter reading as the com­mand parameter. For example:

:CAL:PROT:SOUR 1E-6

4. Connect the 1Ω resistor and DMM to the Model 2430 INPUT/OUPUT jacks, as shown
in Figure 2-3. Select the DMM DC volts function.

5. Repeat step 3 for the 3A range using the calculated current as follows: I = V/R, where V
is the DMM voltage reading, and R is the characterized value of the 1Ω resistor.

Table 2-10

Current calibration initialization commands

Command Descripton

:SOUR:FUNC CURR
:SENS:VOLT:PROT 20
:SENS:VOLT:RANG 20
:OUTP:STAT ON

Select source current mode.
Voltage limit when current source is active.
Make sure 100V range is not active.
Turn source on.

2-22 Calibration

Table 2-11

Current range calibration commands

Step Command/procedure

1

:SOUR:CURR:RANGE <Range>

2

:SOUR:CURR -<Source_value>

3

Take DMM reading.

4

:CAL:PROT:SOUR <DMM_Reading>

5

Check 2430 for errors.

6

:CAL:PROT:SENS <DMM_Reading>

7

Check 2430 for errors.

8

:SOUR:CURR 0.0

9

Take DMM reading.

10

:CAL:PROT:SOUR <DMM_Reading>

11

Check 2430 for errors.

12

:CAL:PROT:SENS <DMM_Reading>

13

Check 2430 for errors.

14

:SOUR:CURR +<Source_value>

15

Take DMM reading.

16

:CAL:PROT:SOUR <DMM_Reading>

17

Check 2430 for errors.

18

:CAL:PROT:SENS <DMM_Reading>

19

Check 2430 for errors.

20

:SOUR:CURR 0.0

21

Take DMM reading.

22

:CAL:PROT:SOUR <DMM_Reading>

1. Perform complete procedure for each range, where <Range> and <Source_value> = 10E-6, 100E-6, 1E-3, 10E-3,
100E-3, 1, or 3.

2. <DMM_Reading> parameter is multimeter reading from previous step.

3. Use :SYST:ERR? query to check for errors.

1

Description

Select source range.

2

3

Establish negative full-range polarity.
Read actual output value.
Calibrate sense function negative full scale.

Calibrate source function negative full scale.

Set output to 0A.
Read actual output value.
Calibrate sense function negative zero.

Calibration source function negative zero.

Establish positive full-range polarity.
Read actual output value.
Calibrate sense function positive full scale.

Calibrate source function positive full scale.

Set output to 0A.
Read actual output value.
Calibrate source positive zero.

Step 4: Program calibration dates

Use following commands to set the calibration date and calibration due date:

:CAL:PROT:DATE <year>, <month>, <day> (Calibration date)
:CAL:PROT:NDUE <year>, <month>, <day> (Next calibration due date)

Note that the year, month, and date must be separated by commas. The allowable range for

the year is from 1998 to 2097, the month is from 1 to 12, and the date is from 1 to 31.

Step 5: Save calibration constants

Calibration is now complete, so you can store the calibration constants in EEROM by sending

the following command:

:CAL:PROT:SAVE

NOTE Calibration will be temporary unless you send the SAVE command. Also, cali-

bration data will not be saved if (1) calibration is locked, (2) invalid data exists,
or (3) all steps were not completed.

Step 6: Lock out calibration

To lock out further calibration, send the following command after completing the calibration

procedure:

:CAL:PROT:LOCK

Single-range calibration

Normally, the complete calibration procedure should be performed to ensure that the entire
instrument is properly calibrated. In some instances, however, you may want to calibrate only
certain ranges. To do so, complete the entire procedure only for the range(s) to be calibrated.
Keep in mind, however, that you must complete all parameter steps for each source or sense
range. Also be sure to set calibration dates and save calibration after calibrating the desired
range(s).

Calibration 2-23

2-24 Calibration

3

Routine Maintenance

3-2 Routine Maintenance

CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.

CAUTION:FOR CONTINUED PROTECTION AGAINST FIRE HAZARD,REPLACE FUSE WITH SAME TYPE AND RATING.

WARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.

WARNING:NO INTERNAL OPERATOR SERVICABLE PARTS,SERVICE BY QUALIFIED PERSONNEL ONLY.

Introduction

The information in this section deals with routine type maintenance that can be performed by

the operator.

Line fuse replacement

WARNING Disconnect the line cord at the rear panel, and remove all test leads con-

nected to the instrument (front and rear) before replacing the line fuse.

The power line fuse is accessible from the rear panel, just above the AC power receptacle

(Figure 3-1).

Figure 3-1

Rear panel

125V

PEAK

4-WIRE
SENSE

WITH FRONT PANEL MENU)

PEAK

LO

(ENTER IEEE ADDRESS

HI

5V



OUTPUT

IEEE-488

INPUT/

125V

PEAK

5V

PK

250V
PEAK

PEAK

5V

V, Ω,

GUARD

GUARD
SENSE

RS232

TRIGGER

LINK

MADE IN

U.S.A.

LINE FUSE

SLOWBLOW

3.15A, 250V

LINE RATING

100-240VAC

50, 60HZ

250VA MAX

OUTPUT
ENABLE

Perform the following steps to replace the line fuse:

1. Carefully grasp and squeeze together the locking tabs that secure the fuse carrier to the fuse holder.

2. Pull out the fuse carrier, and replace the fuse with the type specified in Table 3-1.

CAUTION To prevent instrument damage, use only the fuse type specified in Table 3-

1.

3. Re-install the fuse carrier.

Routine Maintenance 3-3

NOTE If the power line fuse continues to blow, a circuit malfunction exists and must be

corrected. Refer to the troubleshooting section of this manual for additional
information.

Table 3-1

Power line fuse

Line voltage Rating Keithley part no.

100-240V 250V, 3.15A, Slow

Blow 5 × 20mm

FU-106-3.15

3-4 Routine Maintenance

4

Troubleshooting

4-2 Troubleshooting

Introduction

This section of the manual will assist you in troubleshooting and repairing the Model 2430.
Included are self-tests, test procedures, troubleshooting tables, and circuit descriptions. Note
that disassembly instructions are located in Section 5, and component layout drawings are at the
end of Section 6.

Safety considerations

WARNING The information in this section is intended for qualified service personnel

only. Do not perform these procedures unless you are qualified to do so.
Some of these procedures may expose you to hazardous voltages that could
cause personal injury or death. Use caution when working with hazardous
voltages.

Be sure to observe the following precautions regarding heat sink cool-down time and capacitor voltage bleed-down time:

Heat sink cool-down time: five minutes to 70°C, 15 minutes to 50°C.
Capacitor voltage bleed-off time: two minutes to 50V, five minutes to 5V.

Repair considerations

Before making any repairs to the Model 2430, be sure to read the following considerations.

CAUTION The PC-boards are built using surface mount techniques and require spe-

cialized equipment and skills for repair. If you are not equipped and/or
qualified, it is strongly recommended that you send the unit back to the fac
tory for repairs or limit repairs to the PC-board replacement level. Without
proper equipment and training, you could damage a PC-board beyond re
pair.

• Repairs will require various degrees of disassembly. However, it is recommended that
the Front Panel Tests be performed prior to any disassembly. The disassembly instruc
tions for the Model 2430 are contained in Section 5 of this manual.

• Do not make repairs to surface mount PC-boards unless equipped and qualified to do so.
(See previous CAUTION.)

• When working inside the unit and replacing parts, adhere to the handling precautions
and cleaning procedures explained in Section 5.

• Many CMOS devices are installed in the Model 2430. These static-sensitive devices
require special handling as explained in Section 5.

• Whenever a circuit board is removed or a component is replaced, the Model 2430 must
be recalibrated. See Section 2 for details on calibrating the unit.

-

-

-

Power-on self-test

During the power-on sequence, the Model 2430 will perform a checksum test on its EPROM

and test its RAM. If one of these tests fails, the instrument will lock up.

Front panel tests

There are three front panel tests: one to test the functionality of the front panel keys and two
to test the display. In the event of a test failure, refer to Display board checks for details on trou
bleshooting the display board.

KEYS test

The KEYS test lets you check the functionality of each front panel key. Perform the following
steps to run the KEYS test.

1. Display the MAIN MENU by pressing the MENU key.

2. Select TEST, and press ENTER to display the SELF-TEST MENU.

3. Select DISPLAY-TESTS, and press ENTER to display the following menu:

FRONT PANEL TESTS

KEYS DISPLAY-PATTERNS CHAR-SET

4. Select KEYS, and press ENTER to start the test. When a key is pressed, the label name for that key will be displayed to indicate that it is functioning properly. When the key is released, the message “No keys pressed” is displayed.

5. Pressing EXIT tests the EXIT key. However, the second consecutive press of EXIT aborts the test and returns the instrument to the SELF-TEST MENU. Continue pressing EXIT to back out of the menu structure.

Troubleshooting 4-3

-

DISPLAY PATTERNS test

The display test lets you verify that each pixel and annunciator in the vacuum fluorescent dis-

play is working properly. Perform the following steps to run the display test:

1. Display the MAIN MENU by pressing the MENU key.

2. Select TEST, and press ENTER to display the SELF-TEST MENU.

3. Select DISPLAY-TESTS, and press ENTER to display the following menu:

FRONT PANEL TESTS

KEYS DISPLAY-PATTERNS CHAR-SET

4. Select DISPLAY-PATTERNS, and press ENTER to start the display test. There are five
parts to the display test. Each time a front panel key (except EXIT) is pressed, the next
part of the test sequence is selected. The five parts of the test sequence are as follows:

• Checkerboard pattern (alternate pixels on) and all annunciators.

• Checkerboard pattern and the annunciators that are on during normal operation.

• Horizontal lines (pixels) of the first digit are sequenced.

• Vertical lines (pixels) of the first digit are sequenced.

4-4 Troubleshooting

5. When finished, abort the display test by pressing EXIT. The instrument returns to the

CHAR SET test

The character set test lets you display all characters. Perform the following steps to run the

character set test:

1. Display the MAIN MENU by pressing the MENU key.

2. Select TEST, and press ENTER to display the SELF-TEST MENU.

3. Select DISPLAY-TESTS, and press ENTER to display the following menu:

4. Select CHAR-SET, and press ENTER to start the character set test. Press any key except

5. When finished, abort the character set test by pressing EXIT. The instrument returns to

• Each digit (and adjacent annunciator) is sequenced. All the pixels of the selected digit
are on.

FRONT PANEL TESTS MENU. Continue pressing EXIT to back out of the menu
structure.

FRONT PANEL TESTS

KEYS DISPLAY-PATTERNS CHAR-SET

EXIT to cycle through all displayable characters.

the FRONT PANEL TESTS MENU. Continue pressing EXIT to back out of the menu
structure.

Principles of operation

The following information is provided to support the troubleshooting tests and procedures

covered in this section of the manual. Refer to the following drawings:

Figure 4-1 — Overall block diagram

Figure 4-2 — Analog circuitry block diagram

Figure 4-3 — Power supply block diagram

Figure 4-4 — Output stage simplified schematic

Figure 4-5 — Digital circuitry block diagram

Overall block diagram

Figure 4-1 shows an overall block diagram of the Model 2430. Circuitry may be divided into

three general areas:

• Analog circuits — includes sourcing circuits such as the DACs, clamps, output stage,
and feedback circuits, as well as measurement circuits such as the A/D converter.

• Digital circuits — includes the microcomputer that controls the analog section, front
panel, and GPIB and RS-232 ports, as well as associated interfacing circuits.

• Power supplies — converts the AC line voltage into DC voltages that supply the power
for the digital and analog circuits, and the output stage.

Troubleshooting 4-5

Figure 4-1

Overall block
diagram

Display,

Keyboard

Digital

I/O

Trigger

Link

Front

Panel

Controller

Trigger,
Digital

I/O

DACs

Analog Section

Clamps

Feedback

A/D

Converter

Microcomputer

Digital Section

Output

Stage

RS-232

GPIB

Interface

Guard
Buffer

Output

Guard

RS-232 I/O

GPIB I/O

To Analog

Circuits

±15V

Analog

Power

Supply

Output Stage

+5V ±42V

Power Supply

To

Digital Circuits

±150V +5V +12V

Output

Stage

Power

Supply

Line In

To

Digital
Power
Supply

4-6 Troubleshooting

Analog circuits

Figure 4-2 shows a block diagram of the analog circuits.

D/A converters control the programmed voltage and current, or voltage compliance and current
compliance. Each DAC has two ranges, a 10V full-scale output or a 1V full-scale output. The
DAC outputs are fed to the summing node, FB. Either the V DAC or the I DAC has the ability to
control the main loop. If the unit is set for SV (source voltage), it will source voltage until the com
pliance current is reached (as determined by the I DAC setting), and the current loop will override
the voltage loop. If, however, the unit is set for SI (source current), it will source current until the
compliance voltage is reached (as determined by the V DAC setting), and the voltage loop will
override the current loop. A priority bit in the Vclamp/I clamp circuit controls these functions.

The error amplifier adds open-loop gain and slew-rate control to the system to assure accu­racy and provide a controllable signal for the output stage, which provides the necessary voltage
and current gain to drive the output. Sense resistors in the HI output lead provide output current
sensing, and a separate sense resistor is used for each current range. The 1A and 3A ranges use

0.2V full-scale for a full-range output, while all other ranges use 2V output for full-scale current.
Voltage feedback is routed either internally or externally.

Figure 4-2

Analog circuitry block diagram

-

Output

Stage

+42

+150

+

-

Sense

Resistors

Protection

Protection

V DAC

I DAC

Control

FB

VFB

A/D

IFB

V Clamp

I Clamp

+7

MUX

-42

-150

Error
Amp

O

VFB

IFB

S

Remote

O

There are four voltage ranges: 0.2V, 2V, 20V, and 100V. The feedback gain changes only for
the 20V and 100V ranges, resulting in three unique feedback gain values. A multiplexer directs
the voltage feedback, current feedback, reference, or ground signal to the A/D converter. An
opto-isolated interface provides control signals for both DACs, analog circuit control, and A/D
converter communication to the digital section.

O

Output

HI

S+

Output

LO

S-

Guard

Out

Guard

Sense

Power supply

Figure 4-3 shows a block diagram of the Model 2430 power delivery system.

The offline switching power supply provides all power for the instrument while providing
universal inputs and power factor correction for the 120/240V line. The digital board runs off of
5V and 12V supplies derived from the switcher. The +12VD supply is set to program the flash
ROM. (See Digital circuitry below.)

A constant-frequency switching supply runs off the +24VD supplies and generates all the float­ing and output supply voltages for the analog board: +5V and ±15V, ±42V and ±150V.

Troubleshooting 4-7

Figure 4-3

Power supply block
diagram

Output stage

Line

Neutral

Analog Board

+15V +5V

FF F

Constant Frequency
Low Noise Floating
Switching Supply

+24Vdc

D

PFC

DC/DC

Converter

Output Stage

F

-15V

+24dc

Regulators

D

-150V -42V +42V +150V

+12Vdc

DC

+5Vdc

O

Digital

Circuits

D

Figure 4-4 shows a simplified schematic of the output stage.

The Model 2430 output stage serves two purposes: (1) it converts signals from floating com­mon to output common, and (2) it provides both voltage and current amplification. The output
stage drive transistors are biased in class B configuration to prevent the possibility of thermal
runaway with high-current output values.

Output transistors Q518 and Q521 are cascoded with output MOSFETs Q516 and Q523. All
other MOSFETs and transistors are slaves, and the voltages across these devices are determined

4-8 Troubleshooting

by the resistor-capacitor ladder circuits shown. High-current drive capability is provided by
Q500-Q511. Coarse current limits are built into the output stage.

Figure 4-4

Output stage simplified
schematic

Maindrive

O

+15Vf

300K

-15Vf

F

HI Drive

+

-

+85V

Q500

+42V

Q504

Q514

Q516

Q518

F

Q521

F

Q523

HI Drive

Q525

Q507

-42V

Q503

-85V

A/D converter

The SourceMeter unit uses a multi-slope charge balance A/D converter with a single-slope
run-down. The converter is controlled by gate array U610. Commands are issued by the MPU
on the digital board through communications opto-isolators to U610, and U610 sends A/D read
ing data back through opto-isolators to the digital board for calibration and processing.

Active guard

The Model 2430 has an active guard or “six-wire ohms” circuit used to measure complex de­vices. This circuitry provides a low-current (50mA) equivalent of the voltage on output HI. If
the unit is in the SV mode, the low-current equivalent of the source voltage will appear on the
guard terminal. If the unit is in the SI mode, the voltage on output HI is equal to the source cur
rent multiplied by the external resistance value. An equivalent voltage will be generated by the
guard circuit, and a guard sense terminal is provided to sense around the voltage drop in the
guard leads since significant current can flow (50mA).

Digital circuitry

Refer to Figure 4-5 for the following discussion on digital circuitry.

The core digital circuitry uses a Motorola 68332 microcontroller running at 16.78MHz. The
memory configuration includes two 256K × 8-bit flash EEPROMs and two 128K × 8-bit RAMs
used in parallel to utilize the 16-bit data bus of the MPU. The RAM is battery backed-up,
providing continued storage of data buffer information during power-down cycles, and flash
ROM support allows internal firmware upgrades using either the serial or GPIB port for
downloading new firmware. All calibration constants and the save 0 setup are stored in a
separate serial EEPROM. Setups 1 through 4 are stored in battery backed-up RAM.

Troubleshooting 4-9

-

-

External communication is provided via GPIB and serial interfaces. A 9914 GPIB IEEE-488
standard interface IC is used for the GPIB, and a 68332 Queued Serial Module (QSM) provides
the serial UART. For internal communications, the Time Processing Unit (TPU) is used for serial
communications with the front panel display module, and both the TPU and QSM handle digital­to-analog interfacing.

4-10 Troubleshooting

Figure 4-5

Digital circuitry
block diagram

A/D

Control/Data

Reset

2

E PROM

U17

A/D Interface

U9, U25

Voltage Source

Control

ROM

U15, U16

Microprocessor

U3

RAM

U12, U14

16.78MHz

Serial

Interface

U4

GPIB

U6, U13

U20

Digital I/O

Trigger

U23

U7

RS-232 Interface

IEEE-488 Interface

To Display

Board Controller

Trigger

Digital

I/O

Display board circuit theory

Display board components are shown in the digital circuitry block diagram in Figure 4-5.

U902 is the display microcontroller that controls the VFD (vacuum fluorescent display) and
interprets key data. The microcontroller has four peripheral I/O ports that are used for the vari
ous control and read functions.

Display data is serially transmitted to the microcontroller from the digital board via the TXB
line to the microcontroller PD0 terminal. In a similar manner, key data is serially sent back to
the digital board through the RXB line via PD1. The 4MHz clock for the microcontroller is gen
erated on the digital board.

DS901 is the VFD (vacuum fluorescent display) module, which can display up to 49 charac­ters. Each character is organized as a 5 × 7 matrix of dots or pixels and includes a long under­bar segment to act as a cursor.

-

-

The display uses a common multiplexing scheme with each character refreshed in sequence.
U903 and U904 are the grid drivers, and U901 and U905 are the dot drivers. Note that dot driver
and grid driver data is serially transmitted from the microcontroller (PD3 and PC1).

The front panel keys (S901-S931) are organized into a row-column matrix to minimize the
number of microcontroller peripheral lines required to read the keyboard. A key is read by strob
ing the columns and reading all rows for each strobed column. Key down data is interpreted by
the display microcontroller and sent back to the main microprocessor using proprietary encod
ing schemes.

Troubleshooting

Troubleshooting information for the various circuits is summarized below.

Display board checks

If the front panel display tests indicate that there is a problem on the display board, use Table
4-1. See “Principles of operation” for display circuit theory.

Table 4-1

Display board checks

Troubleshooting 4-11

-

-

Step Item/component Required condition Remarks

1

Front panel test

2

J1033

3

U902, pin 1

4

U902, pin 43

5

U902, pin32

6

U902, pine 33

Verify that all segments operate.
+5V, ±5%
Goes low briefly on power up, and
then goes high.
4MHz square wave.
Pulse train every 1 ms.
Brief pulse train when front panel key
is pressed.

Use front panel display test.
Digital +5V supply.
Microcontroller RESET.

Controller 4MHz clock.
Control from main processor.
Key down data sent to main
processor.

4-12 Troubleshooting

Power supply checks

Power supply problems can be checked using Table 4-2. See “Principles of operation” for

circuit theory on the power supply.

Table 4-2

Power supply checks

Step Item/component Required condition Remarks

1
2

3
4
5
6
7
8
9

Digital circuitry checks

Line fuse
Line power

TP502
TP503
TP504
TP505
TP507
TP508
TP510

Check continuity.
Plugged into live receptacle,
power on.
+150V, ±5%

-150V, ±5%
+38V, ±10%

-38V, ±10%
+15V, ±5%

-15V, ±5%
+5V, ±5%

Remove to check.
Check for correct power-up
sequence.
Referenced to TP501.
Referenced to TP501.
Referenced to TP501.
Referenced to TP501.
+15VF, referenced to TP500.

-15VF, referenced to TP500.
+5VF, referenced to TP500.

Digital circuit problems can be checked out using Table 4-3. See “Principles of operation”

for a digital circuit description.

Table 4-3

Digital circuitry checks

Step Item/component Required condition Remarks

1

Power-on test

2

U3 pin 19

3

U3 pin 7

4

U3 pin 68

5

U3, lines A0-A19

6

U3, lines D0-D15

7

U3 pin 66

8

U4 pin 7

9

U4 pin 8

10

U13 pins 34-42

11

U13 pins 26-31

12

U13 pin 24

13

U13 pin 25

14

U3 pin 43

15

U3 pin 44

16

U3 pin 45

17

U3 pin 47

RAM OK, ROM OK.

Digital common.

+5V
Low on power-up, then goes high.
Check for stuck bits.
Check for stuck bits.

16.78MHz.
Pulse train during RS-232 I/O.
Pulse train during RS-232 I/O.
Pulse train during IEEE-488 I/O.
Pulses during IEEE-488 I/O.
Low with remote enabled.
Low during interface clear.
Pulse train.
Pulse train.
Pulse train.
Pulse train.

Verify that RAM and ROM are
functional.
All signals referenced to digital
common.
Digital logic supply.
MPU RESET line.
MPU address bus.
MPU data bus.
MPU clock.
RS-232 RX line.
RS-232 TX line.
IEEE-488 data bus.
IEEE-488 command lines.
IEEE-488 REN line.
IEEE-488 IFC line.
D_ADDATA
D_DATA
D_CLK
D_STB

Analog circuitry checks

Table 4-4 summarizes analog circuitry checks.

Table 4-4

Analog circuitry checks

Step Item/component Required condition Remarks

TP200
TP201
TP202
TP203
TP213
TP218
TP219
TP214
TP232

1

1

1

1

1

2

2

2

1

1
2
3
4
5
6
7
8
9

1. Measured with respect to FCOM (TP500).

2. Measured with respect to OCOM (TP501).

NOTE The test points in Table 4-4 are located under the pulse board and may be difficult

to access without using a jumper cable for J1024.

>100V voltage protection
SOURCE +10V
SOURCE +10V (SVMI)
SOURCE +10V
SOURCE +10V
OUTPUT COM
OUTPUT COM
SVMI, OUTPUT ON, 20V
Bench defaults

Troubleshooting 4-13

-13V ±1V

-5V ±0.5V

-10V ±1V

-10.5V ±1V
0V ±0.1V
7V ±0.7V
7V ±0.7V
20V ±0.5V

6.4V ±0.6V

Battery replacement

WARNING Disconnect the instrument from the power line and all other equipment be-

fore changing the battery.

The volatile memories of the Model 2430 are protected by a replaceable battery when power is
off. Typical battery life is approximately 10 years, but the battery should be replaced if the voltage
drops below 2.5V regardless of age. The battery should be suspected if the instrument no longer
retains buffer data or user-defined operating parameters such as instrument setups, source memo
ry, and math expressions. If the battery is absent or totally exhausted, the display will show the
“Reading buffer data lost” message shortly after the Model 2430 is switched on.

The battery is a 3V wafer-type lithium cell, (Keithley part number BA-46), which is located
on the digital board. Replacement of the battery requires removal of the case cover and analog
board assembly. (See Section 5.) Use only the recommended battery.

NOTE Calibration constants and user-defined parameters will be lost when the battery

is replaced. The Model 2430 must be re-calibrated (section 2) after the battery
is replaced.

-

4-14 Troubleshooting

Battery replacement precautions

WARNING The following precautions must be followed to avoid personal injury.

1. Wear safety glasses or goggles when working with lithium batteries.

2. Do not short the battery terminals together.

3. Keep lithium batteries away from all liquids.

4. Do not attempt to recharge lithium batteries.

5. Observe proper polarity when installing the battery.

6. Do not incinerate or otherwise expose the battery to excessive heat (>60°C).

7. Bulk quantities of lithium batteries should be disposed of as hazardous waste.

Battery replacement procedure

1. Remove the case cover and analog board assembly as covered in Section 5.

2. Locate the battery on the digital board.

3. Carefully unsolder and remove the old battery.

4. Install and solder the new battery in place.

5. Re-assemble the instrument, and turn it on. The “Reading buffer data lost” error message

6. Send the :SYST:MEM:INIT command via remote to perform the following:

will be displayed.

• Clear the reading buffer.

• Initialize instrument setups 1 through 4 to present instrument settings.

• Initialize all 100 source memory locations to present instrument settings.

• Delete user math expressions.

No comm link error

A “No Comm Link” error indicates that the front panel processor has stopped communicating
with the main processor, which is located on the digital board. This error indicates that one of the
main processor ROMs may require re-seating in its socket. ROMs may be reseated as follows:

1. Turn off the power, and disconnect the line cord and all other test leads and cables from the instrument.

2. Remove the case cover as outlined in Section 5.

3. Remove the analog board assembly as outlined in Section 5.

4. Locate the two firmware ROMS, U15 and U16, located on the digital board. These are the only ICs installed in sockets. (Refer to the component layout drawing at the end of Section 6 for exact locations.)

5. Carefully push down on each ROM IC to make sure it is properly seated in its socket.

CAUTION Be careful not to push down excessively; digital board could crack.

6. Connect the line cord, and turn on the power. If the problem persists, additional trouble­shooting will be required.

5

Disassembly

5-2 Disassembly

Introduction

This section explains how to handle, clean, and disassemble the Model 2430. Disassembly

drawings are located at the end of this section.

Handling and cleaning

To avoid contaminating PC board traces with body oil or other foreign matter, avoid touching
the PC board traces while you are repairing the instrument. Motherboard areas covered by the
shield have high-impedance devices or sensitive circuitry where contamination could cause de
graded performance.

Handling PC boards

Observe the following precautions when handling PC boards:

• Wear cotton gloves.

• Only handle PC boards by the edges and shields.

• Do not touch any board traces or components not associated with repair.

• Do not touch areas adjacent to electrical contacts.

• Use dry nitrogen gas to clean dust off PC boards.

-

Solder repairs

Observe the following precautions when you must solder a circuit board:

• Use an OA-based (organic activated) flux, and take care not to spread the flux to other
areas of the circuit board.

• Remove the flux from the work area when you have finished the repair by using pure
water with clean, foam-tipped swabs or a clean, soft brush.

• Once you have removed the flux, swab only the repair area with methanol, then blow­dry the board with dry nitrogen gas.

• After cleaning, allow the board to dry in a 50°C, low-humidity environment for several
hours.

Static sensitive devices

CMOS devices operate at very high impedance levels. Therefore, any static that builds up on
you or your clothing may be sufficient to destroy these devices if they are not handled properly.
Use the following precautions to avoid damaging them:

CAUTION Many CMOS devices are installed in the Model 2430. Handle all semicon-

ductor devices as being static sensitive.

• Transport and handle ICs only in containers specially designed to prevent static build­up. Typically, you will receive these parts in anti-static containers made of plastic or
foam. Keep these devices in their original containers until ready for installation.

• Remove the devices from their protective containers only at a properly grounded work
station. Also, ground yourself with a suitable wrist strap.

• Handle the devices only by the body; do not touch the pins.

• Ground any printed circuit board into which a semiconductor device is to be inserted to
the bench or table.

• Use only anti-static type desoldering tools.

• Use only grounded-tip solder irons.

• Once the device is installed in the PC board, it is normally adequately protected, and you
can handle the boards normally.

Disassembly 5-3

Assembly drawings

Use the assembly drawings located at the end of this section to assist you as you disassemble
and re-assemble the Model 2430. Also, refer to these drawings for information about the Kei
thley part numbers of most mechanical parts in the unit. Assembly drawings include:

• Front panel assembly — 2430-040

• Analog board/heat sink/shield assembly — 2430-050

• Chassis assembly — 2430-051

• Chassis/analog board assembly — 2430-052

• Final chassis assembly — 2430-053

Case cover removal

Follow the steps below to remove the case cover to gain access to internal parts.

WARNING Before removing the case cover, disconnect the line cord and any test leads

from the instrument.

1. Remove handle — The handle serves as an adjustable tilt-bail. Adjust its position by

gently pulling it away from the sides of the instrument case and swinging it up or down.
To remove the handle, swing the handle below the bottom surface of the case and back
until the orientation arrows on the handles line up with the orientation arrows on the
mounting ears. With the arrows lined up, pull the ends of the handle away from the case.

-

5-4 Disassembly

2. Remove mounting ears — Remove the screw that secures each mounting ear. Pull

down and out on each mounting ear.

NOTE When re-installing the mounting ears, make sure to mount the right ear to the

right side of the chassis, and the left ear to the left side of the chassis. Each ear is
marked “RIGHT” or “LEFT” on its inside surface.

3. Remove rear bezel — To remove the rear bezel, loosen the two screws that secure the

rear bezel to the chassis, then pull the bezel away from the case.

4. Remove grounding screws — Remove the two grounding screws that secure the case

to the chassis. They are located on the bottom of the case at the back.

5. Remove chassis — To remove the case, grasp the front bezel of the instrument, and

carefully slide the chassis forward. Slide the chassis out of the metal case.

NOTE To gain access to the components under the analog board shield, remove the

shield, which is secured to the analog board by a single screw.

Analog board removal

Perform the following steps to remove the analog board. This procedure assumes that the case

cover is already removed.

1. Remove the small pulse board before removing the analog board.

2. Disconnect the front and rear input terminals. You must disconnect these input terminal connections for both the front and rear inputs:

• INPUT/OUTPUT HI and LO

• 4-WIRE SENSE HI and LO

•V, Ω, GUARD and GUARD SENSE (rear panel only)

Remove all the connections by pulling the wires off the pin connectors, then remove the fer­rite noise filters from the chassis. During re-assembly, use the following table to identify input
terminals:

Input terminals Front wire color Rear wire color

INPUT/OUTPUT HI
INPUT/OUTPUT LO
4-WIRE SENSE HI
4-WIRE SENSE LO
V, Ω, GUARD
GUARD SENSE

3. Unplug cables.

• Carefully unplug the ribbon cables at J1027, J1028, and J1029.

• Unplug the ON/OFF cable at J1034.

Red
Black
Yellow
Gray

-

-

White/Red
White/Black
White/Yellow
White/Gray
White
Blue/White

Disassembly 5-5

4. Remove screws.

• Remove two fastening screws that secure the analog board assembly to the
chassis. These screws are located on the side of the board opposite from the heat
sink.

• Remove two screws that secure the heat sink to the chassis.

5. Remove analog board assembly. After all screws have been removed, carefully lift the analog board assembly free of the main chassis.

6. Disassemble analog board assembly.

• Remove the screws that secure the analog board and heat sink to the analog board

subchassis.

• Carefully remove the heat sink by sliding the clips off the power transistors.

CAUTION Be careful not to damage the heat sink insulation layer.

• Remove the analog board from the subchassis.

• Remove four screws that secure the bottom cover, then remove the cover
from the bottom of the PC board.

NOTE When re-installing the heat sink, make sure that all clips are properly installed

and centered on each pair of output transistors.

Digital board removal

Perform the following steps to remove the digital board. This procedure assumes that the an-

alog board assembly is already removed.

NOTE In order to remove the digital board, the display board must first be removed.

1. Remove IEEE-488, Digital I/O, and RS-232 fasteners.

The IEEE-488, Digital I/O, and RS-232 connectors each have two nuts that secure the
connectors to the rear panel. Remove these nuts.

2. Remove POWER switch rod.

At the switch, place the edge of a flat-blade screwdriver in the notch on the pushrod.
Gently twist the screwdriver while pulling the rod from the shaft.

3. Unplug cables:

• Unplug the display board ribbon cable.

• Unplug the cables going to the power supply.

• Unplug the rear panel power module cable.

• The fan may need to be removed.

4. Remove digital board.

Slide the digital board forward until it is free of the guide pins, then remove the board.

5-6 Disassembly

During re-assembly, replace the board, and start the IEEE-488, Digital I/O, and RS-232
connector nuts and the mounting screw. Tighten all the fasteners once they are all in
place and the board is correctly aligned.

Front panel disassembly

Use the following procedures to remove the display board and/or the pushbutton switch pad.

1. Unplug the display board ribbon cables.

2. Remove front panel assembly.
This assembly has four retaining clips that snap onto the chassis over four pem nut studs.
Two retaining clips are located on each side of the front panel. Pull the retaining clips
outward and, at the same time, pull the front panel assembly forward until it separates
from the chassis.

3. Using a thin-bladed screwdriver, pry the plastic PC board stop (located at the bottom of the display board) until the bar separates from the casing. Pull the display board from the front panel.

4. Remove the switch pad by pulling it from the front panel.

Removing power components

The following procedures to remove the power supply and/or power module require that the

case cover and motherboard be removed, as previously explained.

Power module removal

Perform the following steps to remove the rear panel power module:

1. Remove the analog board.

2. Unplug the cable connecting the power module to the digital board.

3. Disconnect the power module’s ground wire. This green and yellow wire connects to a threaded stud on the chassis with a kep nut.

4. Squeeze the latches on either side of the power module while pushing the module from the access hole.

WARNING To avoid electrical shock, which could result in injury or death, the ground

wire of the power module must be connected to chassis ground. When in
stalling the power module, be sure to re-connect the green and yellow
ground wire to the threaded stud on the chassis.

-

Instrument re-assembly

Re-assemble the instrument by reversing the previous disassembly procedures. Make sure
that all parts are properly seated and secured, and that all connections are properly made. To en
sure proper operation, replace the analog signal wire ferrite noise filters, and securely fasten the
shield.

WARNING To ensure continued protection against electrical shock, verify that power

line ground (green and yellow wire attached to the power module) is con
nected to the chassis.

Also make sure the two bottom case screws are properly installed to secure and ground the case cover to the chassis.

Disassembly 5-7

-

-

5-8 Disassembly

6

Replaceable Parts

6-2 Replaceable Parts

Introduction

This section contains replacement parts information and component layout drawings for the

Model 2430.

Parts lists

The electrical parts lists for the Model 2430 are shown in tables at the end of this section. For
part numbers to the various mechanical parts and assemblies, use the Miscellaneous parts list
and the assembly drawings provided at the end of Section 5.

Ordering information

To place an order, or to obtain information concerning replacement parts, contact your
Keithley representative or the factory (see inside front cover for addresses). When ordering
parts, be sure to include the following information:

• Instrument model number (Model 2430)

• Instrument serial number

• Part description

• Component designation (if applicable)

• Keithley part number

Factory service

If the instrument is to be returned to Keithley Instruments for repair, perform the following:

• Call the Repair Department at 1-800-552-1115 for a Return Material Authorization
(RMA) number.

• Complete the service form at the back of this manual, and include it with the instrument.

• Carefully pack the instrument in the original packing carton.

• Write ATTENTION REPAIR DEPARTMENT and the RMA number on the shipping
label.

Component layouts

The component layouts for the various circuit boards are provided on the following pages.

Drawings include:

• Analog board — 2430-100

• Display board — 2400-110

• Digital board — 2420-140

Table 6-1

Analog board parts list

Circuit designation Description

Replaceable Parts 6-3

Keithley
Part No.

C200-203, 205-210, 225, 226, 231,
232, 237, 238

C204, C411, C608, C609 CAP, 0.01UF, 10%, 50V, CERAMIC C-491-.01

C211, 212, 213, 214 CAP, 1000PF, 10%, 50V, MONO

C215-222, 611 CAP, 100PF, 5%, 100V, CERAMIC C-465-100P

C223, 224, 227-230, 233-236, 239,
240, 320

C241 CAP, 1000PF, 1%, 50V, CERAMIC C-347-1000P

C242, 243, 248, 249, 254, 255, 258,
259, 260-263

C246, C336 CAP, 3300PF, 10%, 100V, CERAMIC C-430-3300P

C247 CAP, 0.01, 5%, 50V, NPO C-514-.01

C250, 251, 272, 297, 298, 299, 300,
524, 525, 542

C256, C257 CAP, 22PF, 10%, 100V, CERAMIC C-451-22P

C267, C268, C327 CAP, 1000P, 10%, 100V, CERAMIC C-451-1000P

C269-271, 273-282, 284-291, 305­310, 321, 322

C283 CAP, 100P, 10%, 100V, CERAMIC C-451-100P

C296, C330, C400 CAP, 270PF, 2.5%, 630V,

C301, C302 CAP, 1000PF, 10%, 50V, MONO

C311 CAP, 100UF, 20%, 16V, TANTALUM C-504-100

C312-319 CAP, 10PF, 5%, 100V, CERAMIC C-372-10P

C323, 324, 325, 326, 603, 604, 615 CAP, 47P, 5%, 100V, CERAMIC C-465-47P

C328 CAP, 22P, 2%, 200V, CERAMIC C-531-22P

C329 CAP, 220PF, 10%, 100V, CERAMIC C-451-220P

C331, C332, C333, C334 CAP, 100PF, 5%, 100V, CERAMIC C-465-100P

C409, C410 CAP, 0.15UF, 20%, 50V, CERAMIC C-418-.15

C412 CAP, 1UF, 20%, 35V, TANTALUM C-494-1

CAP, 0.1UF, 10%, 25V, CERAMIC C-495-.1

C-452-1000P

CERAMIC

CAP, 33PF, 5%, 100V, CERAMIC C-465-33P

CAP, 0.1UF, 10%, 25V, CERAMIC C-495-.1

CAP, 0.1UF, 10%, 25V, CERAMIC C-495-.1

CAP, 0.1UF, 10%, 25V, CERAMIC C-495-.1

C-405-270P

POLYPROPYLENE

C-452-1000P

CERAMIC

6-4 Replaceable Parts

Table 6-1 (cont.)

Analog board parts list

Circuit designation Description

Keithley
Part No.

C501, C503 CAP, 3.3, 20%, 250V, ALUM

ELECTROLYTIC

C502, 504, 505, 506, 550, 551, 552,
553, 577, 580

C512, C514 CAP, 22PF, 10%, 100V, CERAMIC C-451-22P

C513 CAP, 560PF, 2.5%, 630V,

C515, C541 CAP, 0.1UF, 20%, 50V, CERAMIC C-418-.1

C522, C523, C526, C527 CAP, 3300P, 10%, 500V, CERAMIC C-497-3300P

C528, 533, 567, 568, 569, 570 CAP, 3300P, 10%, 500V, CERAMIC C-497-3300P

C534, C535 CAP, 47U, 20%, 50V, ALUM C-579-47

C537, C538 CAP, 0.1UF, 10%, 500V, X7R C-525-.1

C539, C540 CAP, 0.1UF, 20%, 100V, CERAMIC C-436-.1

C543 CAP, 10PF, 10%, 1000V, CERAMIC C-64-10P

C544, C545, C546, C547, C578,
C579

C548, 558, 565, 566, 581-582, 600,
601, 602

C549, 561, 564, 585 CAP, 0.1UF, 10%, 25V, CERAMIC C-495-.1

C556, C557, C559, C560, C562,
C563, C616

C583, C584 CAP, 1000pF, 20%, 50V, CERAMIC C-418-1000P

C605, 606, 607, 613, 614, 617, 618,
619, 620, 621

C610, C612 CAP, 2200P, 10%, 100V, CERAMIC C-430-2200P

C622, 623, 624, 625, 650, 651, 652,
659-662

CR200-205, 207, 208, 210-213,
216-221, 235

CR206, 209, 222, 223, 230-233,
400, 401

CR224, CR225 RECTIFIER, BARRIER, SCHOTTKY RF-119

CR236, 239, 518, 522, 524, 525 DIODE, SWITCHING, MMBD914 RF-83

CR237, CR523 DIODE, DUAL SWITCHING, BAV99L RF-82

CAP, 0.01U, 10%, 500V, CERAMIC C-497-.01

POLYPROPYLENE

CAP, 0.01U, 10%, 500V, CERAMIC C-497-.01

CAP, 0.1UF, 10%, 25V, CERAMIC C-495-.1

CAP, 22UF, 20%, 25V, TANTALUM C-440-22

CAP, 0.1UF, 10%, 25V, CERAMIC C-495-.1

CAP, 0.1UF, 10%, 25V, CERAMIC C-495-.1

DIODE, SWITCHING, MMBD914 RF-83

DIODE, 1N3595 (DO-7) RF-43

C-400-3.3

C-405-560P

Replaceable Parts 6-5

Table 6-1 (cont.)

Analog board parts list

Keithley

Circuit designation Description

CR517, CR519 RECTIFIER RF-132

CR600 DIODE, DUAL HSM-2822T31 RF-95

CR601 DIODE, SCHOTTKY, SD103C RF-113

HS1, HS2, HS3, HS4, HS5, HS6,
HS7

J1027, J1036 CONN, HEADER STRAIGHT SOLDER

J1028 CONNECTOR, HEADER STRAIGHT

J1029 CONN, MALE, 5-PIN (MOLEX 42491) CS-784-5

J1034, J1037, J1038 LATCHING HEADER, FRICTON, SGL

K200-205 N.C. RELAY, 1 FORMB, AQV214S RL-176

K206, K207, K208 FORM 2A2B POLARIZED RELAY RL-207

K211, K500 RELAY, SURFACE MOUNT RL-188

L201, L500, L501 CHOKE, SHIELD BEAD CH-52

L600, 601, 602 FERRITE CHIP 600 OHM BLM32A07 CH-62

L603 FERRITE CHIP 600 OHM BLM32A07 CH-62

Q200, 201, 202, 203, 204, 205, 206,
207, 240, 241

Q208, Q210, Q212, Q214, Q216,
Q218

Q209, Q211, Q213, Q215, Q217,
Q219

Q220 TRANS, NPN SILICON, MJE340 TG-209

Q221 TRANS, PNP POWER, MJE350 TG-210

Q222, Q224 TRANS, N-CHAN JFET, SST4393 TG-263

Q223, 229, 234-239, 244, 245, 246,
255, 256, 258

Q225 TRANSISTOR TG-373

Q226 TRANSISTOR TG-374

Q227, 257, 501, 510, 515, 517, 519,
522, 524, 534

HEAT SINK HS-55

PIN

SOLDER PIN

ROW

TRANS, N CHANNEL JFET, SNJ132199 TG-294

TRANS, NPN CATV SILICON, MPSH17 TG-221

TRANS, CURR REG, CDLL5313 TG-321

TRANS, N-MOSFET, VN0605T TG-243

TRANS, NPN, MMBT3904 TG-238

Part No.

CS-368-16

CS-368-14

CS-724-3

6-6 Replaceable Parts

Table 6-1 (cont.)

Analog board parts list

Keithley

Circuit designation Description

Q228, 247, 248, 520, 601 TRANS, PNP, MMBT3906L TG-244

Q242, Q243 TRANS, N-CHAN MOSFET, TN254ON8 TG-274

Q249, Q528 TRANS, NPN SILICON, BC846BL TG-278

Q250, Q529 TRANS, PNP, BC856BL TG-287

Q401, 404, 405, 410, 411, 420, 502,
540, 541

Q402, Q409, Q259 TRANS, N-CHAN DMOS FET, TN2504N8 TG-261

Q403, Q406, Q407, Q408 TRANS, N-CHAN JFET, SST109 TG-266

Q412, Q414 TRANS, N-MEGAFET, RFD14N05LSM TG-267

Q415, Q416 TRANSISTOR TG-377

Q417, Q419 N CHANNEL MEGAFET TG-339

Q230, Q418, Q542 TRANS, P-CHAN, MOSFET, TP0610T TG-259

Q500, Q503 TRANSISTOR TG-372

Q504, Q514, Q516, Q518 N CHANNEL POWER MOSFET TG-349

Q507, Q521, Q523, Q525 P CHANNEL POWER MOSFET TG-348

Q526, Q527, Q530, Q531 TRANS, N CHANNEL MOSFET,

Q532, Q536 TRANS, N-CHANNEL FET, IRF630 TG-214

Q533, Q539 TRANS, P-CHANNEL 200V FET, IRF9630 TG-215

Q535, 537, 538, 600 TRANS, NPN, MMBT3904 TG-238

Q602-607 TRANS, N-MOSFET, VN0605T TG-243

R117-128, 133-136, 141-144 RES, 10K, 5%, 250MW, METAL FILM R-376-10K

R129, 155, 211, 224-229, 234-237,
244-247, 281

R137-140, R145-149, R713, R714 RES, 10K, 5%, 250MW, METAL FILM R-376-10K

R150, 151, 389, 390, 431-434, 451,
520, 531, 536

R152 RES, 4.99K, 0.1%, 0.125W, THIN FILM R-456-4.99K

R153, 154, 240, 243, 248, 251, 253,
254, 257, 258

R200, R201, R203, R232, R238 RESISTOR NETWORK, 10K-10K TF-236

TRANS, N-MOSFET, VN0605T TG-243

SI9410DY

RES, 10K, 1%, 100MW, THICK FILM R-418-10K

RES, 1K, 1%, 100MW, THICK FILM R-418-1K

RES, 4.99K, 1%, 100MW, THICK FILM R-418-4.99K

Part No.

TG-302

Table 6-1 (cont.)

Analog board parts list

Circuit designation Description

Replaceable Parts 6-7

Keithley
Part No.

R202, 204, 252, 255, 256, 259, 260,
263, 264, 267

R205, 310, 485, 552, 595, 598 RES, 0.0499, 1%, 100MW, THICK FILM R-418-.0499

R207 RES, 20K, 0.1%, 0.125W, THIN FILM R-456-20K

R208, R210 RES, 768, 1%, 100MW, THICK FILM R-418-768

R209, 268, 269, 270, 271, 658 RES, 1M, 1%, 100MW, THICK FILM R-418-1M

R212 RES, 332, 1%, 100MW, THICK FILM R-418-332

R213 RES NET 5K, 0.1%, 668A TF-243-5K

R216, 221, 223, 274, 275, 276, 277,
278, 279

R217 RES, 121K, 1%, 100MW, THICK FILM R-418-121K

R218 RES, 80.6K, 1%, 100MW, THICK FILM R-418-80.6K

R219, 220, 222, 230, 231, 373, 374,
616, 700, 701

R241, R242, R249, R250, R653,
R664

R261, 262, 265, 266, 311, 312, 313,
314, 315, 316

R272, 273, 347, 348, 511, 512 RES, 249K, 1%, 100MW, THICK FILM R-418-249K

R280 RES, 4.02K, 1%, 100MW, THICK FILM R-418-4.02K

R282, 284-286, 288, 301, 438, 439,
592, 617, 622

R283, 287, 297, 299, 349, 350, 351,
352, 457, 461

R289, R303, R681, R684 RES, 20K, 0.1%, 0.125W, THIN FILM R-456-20K

R290, 309, 336, 340, 343, 344, 353,
355, 356, 359

R291, R293 RES, 42.7K, 0.1%, 0.125W, THIN FILM R-456-42.7K

R292, 338, 527, 528, 533, 535, 544,
546, 547, 588

R294, R295, R296 RES, 100K, 0.1%, 0.125W, THIN FILM R-456-100K

R298, R300 RES, 150K, 1%, 100MW, THICK FILM R-418-150K

R302 RES, 0.0499, 1%, 100MW, THICK FILM R-418-.0499

RES, 100K, 1%, 100MW, THICK FILM R-418-100K

RES, 20K, 1%, 100MW, THICK FILM R-418-20K

RES, 49.9K, 1%, 100MW, THICK FILM R-418-49.9K

RES, 140K, 1%, 100MW, THICK FILM R-418-140K

RES, 4.99K, 1%, 100MW, THICK FILM R-418-4.99K

RES, 10K, 1%, 100MW, THICK FILM R-418-10K

RES, 30.1K, 1%, 100MW, THICK FILM R-418-30.1K

RES, 1K, 1%, 100MW, THICK FILM R-418-1K

RES, 100K, 1%, 100MW, THICK FILM R-418-100K

6-8 Replaceable Parts

Table 6-1 (cont.)

Analog board parts list

Keithley

Circuit designation Description

R304, R305, R306, R548 RES, 33, 5%, 250MW, METAL FILM R-376-33

R307, R413, R652, R665 RES, 357, 1%, 100MW, THICK FILM R-418-357

R308, 379-387, 391, 392 RES, 475, 1%, 100MW, THICK FILM R-418-475

R317, 334, 335, 337, 339, 357, 366,
367, 424, 425

R318, R563 RES, 15k, 1%, 100MW, THICK FILM R-418-15K

R332, 423, 430, 604, 606 RES, 499, 1%, 100MW, THICK FILM R-418-499

R341, R342, R697, R698 RES, 13K, 1%, 100MW, THICK FILM R-418-13K

R345, 364, 370, 371, 372, 402, 403,
404, 416, 417

R346 RES, 402K, 1%, 100MW, THICK FILM R-418-402K

R354, R437 RES, 560K, 5%, 250MW, METAL FILM R-376-560K

R358, 482, 484, 487 RES, 6.04K, 1%, 100MW, THICK FILM R-418-6.04K

R361, 362, 365, 369, 418, 419, 420,
421, 456, 458

R363 THICK FILM TF-274

R368 RES, 332, 1%, 100MW, THICK FILM R-418-332

R375, R376, R576, R578 RES, 10, 10%, 100MW, THICK FILM R-418-10

R388, 393-399, 411, 412, 699 RES, 357, 1%, 100MW, THICK FILM R-418-357

R422 RES, 4.7K, 5%, 250MW, METAL FILM R-376-4.7K

R426, 429, 601, 603, 605, 608, 626,
702, 703

R435, 504, 590, 673, 688, 689, 715,
716

R436 RES, 499, 1%, 100MW, THICK FILM R-418-499

R450 RES, 200K, 0.1%, 1/10W, METAL FILM R-263-200K

R452 RES, 21.93K, 0.1%, 1/10W, METAL FILM R-263-21.93K

R453 RES, 1.82K, 0.1%, 1/10W, METAL FILM R-263-1.82K

R454, R455, R467, R468, R469,
R470, R471

R459, 488, 500, 515, 560, 561, 562,
600

RES, 4.99K, 1%, 100MW, THICK FILM R-418-4.99K

RES, 100K, 1%, 100MW, THICK FILM R-418-100K

RES, 1K, 1%, 100MW, THICK FILM R-418-1K

RES, 4.99K, 1%, 100MW, THICK FILM R-418-4.99K

RES, 10K, 1%, 100MW, THICK FILM R-418-10K

RES, 100, 0.1%, 1/10W, METAL FILM R-263-100

RES, 100K, 1%, 100MW, THICK FILM R-418-100K

Part No.

Table 6-1 (cont.)

Analog board parts list

Circuit designation Description

Replaceable Parts 6-9

Keithley
Part No.

R460, 462, 466, 472, 478, 481, 489,
502, 510, 558

R463, 473, 479 RES, 30.1K, 1%, 100MW, THICK FILM R-418-30.1K

R474 RES, 0.2 5%, 2W R-473-.2

R483, R691, R695 RES, 2K, 1%, 100MW, THICK FILM R-418-2K

R490 RES, 205, 0.1%, 1/10W, METAL FILM R-263-205

R501, R514, R529 RES, 1K, 1%, 100MW, THICK FILM R-418-1K

R503, R545, R587 RES, 15k, 1%, 100MW, THICK FILM R-418-15K

R505 RES, 13K, 1%, 100MW, THICK FILM R-418-13K

R506, R507 RES, 150K, 5%, 250MW, METAL FILM R-376-150K

R508, R509 RES, 150K, 5%, 250MW, METAL FILM R-376-150K

R516, R523 RES, 4.02K, 1%, 100MW, THICK FILM R-418-4.02K

R517, R524, R564, R565, R566,
R567

R521 RES, 2M, 1%, 100MW, THICK FILM R-418-2M

R525, R526 RES, 1.21K, 1%, 100MW, THICK FILM R-418-1.21K

R530, R532, R534, R537, R559,
R712

R538, 539, 540, 541, 542, 543, 568,
569

R553, R554 RES, 75K, 1%, 100MW, THICK FILM R-418-75K

R570, 571, 573, 581, 705 RES, 249, 1%, 100MW, THICK FILM R-418-249

R572, 574, 580, 582 RES, 200K, 1%, 100MW, THICK FILM R-418-200K

R575, R579, R614, R615 RES, 2.21K, 1%, 100MW, THICK FILM R-418-2.21K

R583, 584, 585, 586 RES, 10, 5%, 125MW, METAL FILM R-375-10

R589 RES, 249K, 1%, 100MW, THICK FILM R-418-249K

R602, R607 RES, 150, 5%, 250MW, METAL FILM R-376-150

R609 RES NET TF-245

R610 RES, 1.28M, 0.1%, 1/8W, METAL FILM R-176-1.28M

R611, R621 RES, 475, 1%, 100MW, THICK FILM R-418-475

R612 RES, 5.11K, 1%, 100MW, THICK FILM R-418-5.11K

R613, 624, 659, 660 RES, 100, 1%, 100MW, THICK FILM R-418-100

RES, 1K, 1%, 100MW, THICK FILM R-418-1K

RES, 12.1, 1%, 125MW, METAL FILM R-391-12.1

RES, 1K, 1%, 100MW, THICK FILM R-418-1K

RES, 0.5, 5%, 1W, METAL R-444-.5

6-10 Replaceable Parts

Table 6-1 (cont.)

Analog board parts list

Keithley

Circuit designation Description

R618 RES, 34K, 1%, 100MW, THICK FILM R-418-34K

R619 RES, 4.75K, 1%, 100MW, THICK FILM R-418-4.75K

R620 RES, 82.5, 1%, 100MW, THICK FILM R-418-82.5

R623 RES, 10, 10%, 100MW, THICK FILM R-418-10

R650, R651 RES NET, 9K-1K, MICRO DIVIDER TF-246-2

R130, 654, 655, 668, 669, 687 RES, 10K, 1%, 100MW, THICK FILM R-418-10K

R656 RES, 6.04K, 0.1%, 0.125W, THIN FILM R-456-6.04K

R657, R692, R696 RES, 1M, 1%, 100MW, THICK FILM R-418-1M

R666 RES NET, 3K, 12K, 0.1%, 100MW,

THINFILM

R670 THICK FILM TF-273-4

R672 RES, 2M, 1%, 100MW, THICK FILM R-418-2M

R675, 704, 706, 707, 708, 709 RES, 1K, 1%, 100MW, THICK FILM R-418-1K

R682, R685 RES, 42.7K, 0.1%, 0.125W, THIN FILM R-456-42.7K

R683, R686 RES, 7.32K, 0.1%, 0.125MW, THIN FILM R-456-7.32K

R690, R694 RES, 100K, 5%, 250MW, METAL FILM R-376-100K

R710 RES, 0.065, 1%, 3W R-474-.065

R717, R718 RES, 10, 5%, 250MW, METAL FILM R-376-10

R719 RES, 100, 5%, 125MW, METAL FILM R-375-100

R721 RES, 2K, 1%, 100MW, THICK FILM R-418-2K

RT200 POLYSWITCH, PTC RESISTOR RT-17

RT500 THERMISTER, PD=7MW/DEG C, 1500V,

613.74K

TP200-215, 218-225, 227, 228,
230-235

TP500-505, 507, 508, 510 SURFACE MOUNT PCB TEST POINT CS-1026

U201, U238 IC, CMOS ANA SWITCH SPST

U202, U203, U650 IC, OP AMP LT1112 IC-1048

U204, U229 IC, 8-CHAN ANA MULTIPLEXER,

U205, U407 IC, HEX INVERTERS, 74HCT04 IC-880

SURFACE MOUNT PCB TEST POINT CS-1026

MAX326CSE

DG408DY

Part No.

TF-237-2

RT-8

IC-909

IC-844

Table 6-1 (cont.)

Analog board parts list

Circuit designation Description

Replaceable Parts 6-11

Keithley
Part No.

U206, U207, U208, U233, U264,
U600

U209, U215 IC, QUAD COMPARATOR, LM339D IC-774

U210, U220 IC, DUAL BIPOLAR OP-AMP, LT1124CS8 IC-955

U211, U213 IC, BIFET OP AMP, AD712JR IC-834

U212, 214, 230, 241, 400-406, 652 IC, CMOS ANAL SWITCH, DG444DY IC-866

U216, U218, U225, U410 IC, DUAL J-FET OP-AMP, OP-282GS IC-968

U219, U231, U234, U235, U262 IC, OP AMP, LOW POWER AD795JR IC-1052

U221, U227 IC, DIFF. AMP, AMP03GP IC-988

U222 IC, OP-AMP, LTC1050CS8 IC-791

U223, U411, U507, U508 IC, MOSFET DRIVER, TLP591B IC-877

U224, U602, U603, U651, U510 IC, QUAD 2 IN NOR, 74HCT02 IC-809

U226, U659 IC, 20V OP-AMP, LT1097S8 IC-767

U228, U263 IC, OP-AMP, LOW NOISE LT1007CS8 IC-949

U236, U606 IC, HI-SPEED BIFET OP-AMP, AD711JR IC-894

U239, U266 IC, QUAD 2-INPUT NAND, 74HC00M IC-781

U240 IC, POS NAND GATES/INVERT, 74HCT14 IC-656

U242, 243, 244, 245, 246, 247 IC, DUAL HIGH CMR/SPEED OPTO,

U252, U253, U254, U255, U256 IC, 8 STAGE SHIFT CD74HC4094M IC-1026

U257 IC, SUPPLY VOLT SUPERVISOR,

U265 QUAD 2-INPUT NAND GATE IC-1148

U500 IC, OP-AMP, AD847JN IC-890

U501, U506, U513, U514 IC, VOLT COMPARATOR, LM393D IC-775

U503 IC, +5V VOLTAGE REGULATOR,

U504 IC, POS VOLTAGE REG +15V, 500MA,

U505 IC, NEG VOLTAGE REG -15V, 500MA,

U511, U512 CONTROLLER, PROGRAMMABLE,

IC, DUAL PICOAMP OP-AMP AD706JR IC-910

IC-588

HCPL-2631

IC-860

TL7705A

IC-576

LM2940CT

IC-194

78M15

IC-195

79M15

IC-1062

TEMP

6-12 Replaceable Parts

Table 6-1 (cont.)

Analog board parts list

Keithley

Circuit designation Description

U515 OPTOCOUPLER, HIGH SPEED IC-1173

U601 IC, QUAD D FLIP FLOP W/CLK, RESET

74HC175

U604 IC, NCHAN LAT DMOS QUADFET,

SD5400CY

U605 INTEGRATED CIRCUIT, OPA177GS IC-960

U607 IC, OP-AMP, NE5534D IC-802

U608 IC, VOLT. COMPARATOR, LM311M IC-776

U609 PROGRAM 2400-801A01

U660, U661 IC, 16 BIT DAC, AD7849BR IC-1004

VR200, VR201 DIODE, ZENER, MM524694 TI DZ-113

VR202, 203, 407, 408, 409, 506,
507

VR214, VR215 DIODE, ZENER, 8.2V, MMBZ5237 DZ-92

VR400, VR401 DIODE, ZENER, 4.7V, 1N4732A DZ-67

VR410, 514, 515, 601, 604 DIODE, ZENER, 3.3V, MMBZ5226BL DZ-94

VR500, VR501, VR502, VR503 DIODE, ZENER, 12V, MMSZ12T1 DZ-112

VR509, VR510 DIODE, ZENER, 15V, 1N4744A DZ-75

VR600 DIODE, ZENER, 6.4V, 1N4579 DZ-73

VR602, VR603 DIODE, ZENER, 6.2V, MMSZ6V2 DZ-97

VR605, VR606 DIODE, ZENER, 17V, MMBZ5247BL DZ-104

Y600 OSCILLATOR, HIGH SPEED, CMOS

DIODE, ZENER, 5.1V, BZX84C5V1 DZ-88

12MHZ

Part No.

IC-923

IC-893

CR-37

Replaceable Parts 6-13

Table 6-2

Digital board parts list

Keithley

Circuit designation Description

BT1 BATTERY, 3V BA-46

C1, 3, 11-14, 16, 17, 20, 22, 23, 25,
26, 30, 77

C103 CAP, 100UF, 20%, 10V, ALUM ELEC C-483-100

C104 CAP, 10UF, 20%, 63V, ALUM ELEC C-403-10

C107, C110 CAP, 82U, 20%, 450V, ALUMINUM C-554-82

C113, C115, C117, C119 CAP, 10U, 20%, 35V, TANTALUM C-551-10

C114 CAP, 220UF, ±20%, 50V, ALUM ELEC C-507-220

C116 CAP, 100UF, 20%, 16V, ALUM ELEC C-530-100

C120 CAP, 270PF, 5%, 100V, CERAMIC C-465-270P

C121 CAP, 390P, 10%, 100V, CERAMIC C-451-390P

C122, C125 CAP, 0.47U, 20%, 25V C-520-.47

C123 CAP, 0.1UF, 20%, 50V, CERAMIC C-418-.1

C126 CAP, 100P, 10%, 100V, CERAMIC C-451-100P

C127, C128, C129, C130, C211 CAP, 100P, 10%, 100V, CERAMIC C-451-100P

C131 CAPACITOR C-570-470

C15, C37, C204, C205, C206, C207,
C208, C209

C19, C69, C75, C85, C92, C200,
C201

C2, 4, 8, 24, 44, 56, 61, 76, 78, 80, 82,
87, 88, 89

C202 CAP, 47PF, 10%, 100V, CERAMIC C-451-47P

C203 CAP, 1000PF, 10%, 50V, MONO

C24, C96 CAP, 0.1U, 20%, 250V, FILM C-553-.1

C28 CAP, 47P, 5%, 100V, CERAMIC C-465-47P

C31, C50, C210 CAP, 100PF, 5%, 100V, CERAMIC C-465-100P

C32, C36 CAP, 1UF, 20%, 50V, CERAMIC C-519-1

C33, C63, C74, C93 CAP, 0.047U, 10%, 50V, CERAMIC C-491-.047

C35 CAP, 22UF, 20%, 25V, TANTALUM C-440-22

C39, 41, 42, 49, 59, 66-68, 79, 81, 83 CAP, 0.1UF, 10%, 25V, CERAMIC C-495-.1

CAP, 0.1UF, 10%, 25V, CERAMIC C-495-.1

CAP, 0.01U, 10%, 500V, CERAMIC C-497-.01

CAP, 0.1UF, 10%, 25V, CERAMIC C-495-.1

CAP, 0.01UF, 10%, 50V, CERAMIC C-491-.01

CERAMIC

Part No.

C-452-1000P

6-14 Replaceable Parts

Table 6-2 (cont.)

Digital board parts list

Keithley

Circuit designation Description

C4, C10 CAP, 15P, 1%, 100V, CERAMIC C-512-15P

C43 CAP, 0.33UF, 10%, 50V, CERAMIC C-464-.33

C5 CAP, 0.1UF, 20%, 100V, CERAMIC C-436-.1

C51 CAP, 33PF, 10%, 1000V, CERAMIC C-64-33P

C45, C53, C54, C60 CAPACITOR C-527-5000P

C21, C29, C55 CAP, 0.01, 5%, 50V, NPO C-514-.01

C38, C48, C57, C58 CAP, 1000PF, 10%, 50V, MONO

CERAMIC

C62, C91 CAP, 10UF, 20%, 25V, TANTALUM C-440-10

C65 CAP, 0.022UF, 10%, 50V, CERAMIC C-491-.022

C72, C86 CAP, 1UF, 20%, 50V, CERAMIC C-519-1

C6, 7, 9, 18, 52, 64, 71, 73, 84, 90,
102

C94 CAP, 470UF, -20+100%, 16V, ALUMINUM C-313-470

C95, C106, C112, C118 CAP, 22UF, -10+100%, 35V,

C97 CAP, 1, 30%, 250V FILM C-553-1

C99 CAP, .01uF, 20%, 50V, CERAMIC C-418-.01

CR13, CR200 DIODE, DUAL HSM-2822T31 RF-95

CR5, 14, 15, 22-24, 32, 33 DIODE, DUAL SWITCHING, BAV99L RF-82

CR1-4, 35, 37, 38, 39, 47 RECTIFIER, POWER, ULTRAFAST RF-107

CR201, CR202, CR203, CR204,
CR205

CR36, CR43, CR44, CR45, CR46 DIODE, ULTRAFAST, MUR860 RF-68

CR48, CR49 DIODE, SWITCHING, MMBD914 RF-83

CR6, CR12, CR40, CR41 RECTIFIER, POWER, ULTRAFAST RF-106

CR7 DIODE, SWITCHING, MMSD914T19 RF-112

CR9 RECTIFIER, BRIDGE RF-120

F1 POLYSWITCH, SMD030-2 FU-103

F2 FUSE, 3A FU-107-1

F3, F4, F5 FUSE, 1A FU-109-1

HS1, HS2 HEAT SINK HS-38

CAP, 0.1UF, 10%, 25V, CERAMIC C-495-.1

ELECTROLYTIC

DIODE, DUAL COMMON ANODE,
BAW56LT2

Part No.

C-452-1000P

C-309-22

RF-98

Replaceable Parts 6-15

Table 6-2 (cont.)

Digital board parts list

Keithley

Circuit designation Description

J1002 CONN, MOLEX, 3-PIN CS-772-3

J1023 CONN, RIGHT ANGLE, 24 PIN CS-507

J1024 CONN, RT ANGLE, MALE, 9 PIN CS-761-9

J1025 CONN, MICRODIN W/GND FINGERS CS-792

J1026 CONN, D-SUB MALE, BOARDLOCK

TYPE

K1 RELAY, SURFACE MOUNT RL-188

L1 FERRITE CHIP, 600 OHM, BLM32A07 CH-62

L3 CHOKE, LINE FILTER, COMBINATION CH-81

L4, L5, L6, L7 INDUCTOR CH-89-1

LS1 BEEPER, 5V, 30MA, QMX-05 EM-6

P1027, P1033 CABLE ASSEMBLY CA-62-4B

P1028 CABLE ASSEMBLY CA-32-9B

P1035 LATCHING HEADER, FRICTON, SGL

ROW

PS1 POWER SUPPLY PS-54-2A

Q1, Q3, Q4, Q5, Q6, Q200, Q201,
Q202

Q10 TRANS, NPN, MMBT3904 TG-238

Q11 TRANS, HEXFET POWER MOSFET TG-304

Q7, Q12 TRANSISTOR TG-382

Q13 TRANS, N-CHAN MOSFET, 2SK1412 TG-276

Q14 TRANS, PNP, MMBT3906L TG-244

Q2 HEXFET POWER MOSFET TG-338

Q8 POWER MOSFET IRFIZ34G TG-313

Q9 TRANS, TRIODE THYRISTOR,

R1, R37, R43, R44, R45, R65 RES, 2.21K, 1%, 100MW, THICK FILM R-418-2.21K

R10 RES, 332K, 1%, 100MW, THICK FILM R-418-332K

R67, R101 RES, 20K, 1%, 100MW, THICK FILM R-418-20K

R102 RES, 100K, 1%, 100MW, THICK FILM R-418-100K

R103, R105 RES, 806, 1%, 100MW, THICK FILM R-418-806

TRANS, N-MOSFET, VN0605T TG-243

MAC223A6

Part No.

CS-848-9

CS-724-3

TG-172

6-16 Replaceable Parts

Table 6-2 (cont.)

Digital board parts list

Keithley

Circuit designation Description

R51, R108 RES, 249K, 1%, 100MW, THICK FILM R-418-249K

R111 RES, 357, 1%, 100MW, THICK FILM R-418-357

R112 RESISTOR, FLAME-PROOF R-439-470K

R113 RES, 49.9K, 1%, 100MW, THICK FILM R-418-49.9K

R116 RES, 4.99K, 1%, 100MW, THICK FILM R-418-4.99K

R118 RES, 49.9K, 1%, 100MW, THICK FILM R-418-49.9K

R121 RES, 215, 1%, 100MW, THICK FILM R-418-215

R97, R100, R122 RES, 100, 1%, 100MW, THICK FILM R-418-100

R8, 15, 17, 18, 21, 23, 31, 48, 61, 70,
72, 155, 119

R2, 4, 13, 14, 19, 34, 35, 50, 52, 58,
62, 63, 68, 75

R200 RES, 1K, 1%, 100MW, THICK FILM R-418-1K

R201 RES, 8.06K, 1%, 0.1W, THICK FILM R-418-8.06K

R202 RES, 6.04K, 1%, 100MW, THICK FILM R-418-6.04K

R206, R210 RES, 4.99K, 1%, 100MW, THICK FILM R-418-4.99K

R208, R214 RES, 2M, 1%, 100MW, THICK FILM R-418-2M

R6, R213 RES, 10K, 1%, 100MW, THICK FILM R-418-10K

R22 RES, 4.02K, 1%, 100MW, THICK FILM R-418-4.02K

R25, R28, R49 RES, 4.75K, 1%, 100MW, THICK FILM R-418-4.75K

R3 RES, 11K, 1%, 100MW, THICK FILM R-418-11K

R30, R117 RES, 100, 1%, 100MW, THICK FILM R-418-100

R33, R92, R95 RES, 0.0499, 1%, 100MW, THICK FILM R-418-.0499

R36, R47 RES, 10K, 1%, 100MW, THICK FILM R-418-10K

R24, R27, R32, R40 RES, 5.1K, 5%, 125MW, METAL FILM R-375-5.1K

R41, 56, 96, 98, 114, 115 RES, 0.1%, 1/10W, METAL FILM R-168-498K

R46 RES, 10, 10%, 100MW, THICK FILM R-418-10

R5 RES, 10M, 1%, 125MW, THICK FILM R-418-10M

R55 RES, 10M, 1%, 125MW, THICK FILM R-418-10M

R57 RES, 1M, 1%, 100MW, THICK FILM R-418-1M

R59 RES, 475, 1%, 100MW, THICK FILM R-418-475

RES, 1K, 1%, 100MW, THICK FILM R-418-1K

RES, 10K, 1%, 100MW, THICK FILM R-418-10K

Part No.

Replaceable Parts 6-17

Table 6-2 (cont.)

Digital board parts list

Keithley

Circuit designation Description

R66 RES, 100K, 10%, 1W, METAL FILM R-464-100K

R7, 26, 69, 71, 73, 74, 76, 78-81, 83,
85-89

R77, R205, R211 RES, 15K, 1%, 100MW, THICK FILM R-418-15K

R82 RES, 499, 1%, 100MW, THICK FILM R-418-499

R38, R84, R109, R110, R203, R207,
R209, R212

R9, R11, R12, R16, R20 RES, 100, 5%, 250MW, METAL FILM R-376-100

R90 RES, 1.07K, 1%, 100MW, THICK FILM R-418-1.07K

R93, R120 RES, 6.04K, 0.1%, 0.125W, THIN FILM R-456-6.04K

R94 RES, 0.15, 1%, 30W R-463-.15

R99, R107 RES, 150K, 1%, 100MW, THICK FILM R-418-150K

RT101 INRUSH CURRENT LIMITER RT-22

RT200, RT201 THERMISTER, PD=7MW/DEG C,

RV1 SUPPRESSOR, TRANSIENT VOLTAGE,

RV101 VARISTOR, METAL OXIDE VR-7

SO1, SO2 SOCKET PLCC-032-T-A SO-143-32

S1 SWITCH, PUSHBUTTON (6 POLE) SW-466

T1 TRANSFORMER TR-335A

T2 TRANSFORMER TR-312A

T3 TRANSFORMER TR-317A

TP3, TP4, TP6, TP17 CONN, TEST POINT CS-553

U10, U27 LARGE SCALE IC, SMT IC-980

U11, U41 IC, VOLT COMPARATOR LM393D IC-775

U12, U14 LARGE SCALE IC LSI-162-70

U13 IC, GPIB ADAPTER, 9914A LSI-123

U15, ODD PROGRAMMED ROM 2400-803C11

U16, EVEN PROGRAMMED ROM 2400-804C11

U17 IC, SERIAL EPROM, 24LC16B LSI-153

RES, 10K, 1%, 100MW, THICK FILM R-418-10K

RES, 10K, 1%, 100MW, THICK FILM R-418-10K

1500V,613.74K

JUNCTION

Part No.

RT-8

VR-10

6-18 Replaceable Parts

Table 6-2 (cont.)

Digital board parts list

Circuit designation Description

Keithley
Part No.

U18 IC, REGULATOR SWITCHING,

78ST105SC

U2 IC, MICROMANAGER, DS12365-10 IC-884

U20 IC, OCTAL INTERFACE BUS, 75160 IC-646

U21 IC, DUAL POWER MOSFET DRIVER,

TSC426

U1, U22 IC, DUAL D-TYPE F/F, 74HC74 IC-773

U23, U25, U29 IC, POS NAND GATES/INVERT, 74HCT14 IC-656

U24 IC, TRIPLE 3 IN NAND, 74F10 IC-659

U26 IC, VOLTAGE REGULATOR, LM340-12 IC-60

U28 IC, POWER VOLT REF, LT1004CZ 2.5 IC-929

U3 MICROCONTROLLER, MC68332-FC LSI-161

U4 IC, +5V, RS-232 TRANSCEIVER, MAX202 IC-952

U5 IC, OP-AMP, AD705JR IC-814

U6 IC, OCTAL INTER BUS TRANS, 75161 IC-647

U7 PROTECTED QUAD POWER DRIVERS IC-1212

U8 POWER FACTOR CONTROLLER IC-1113

U9 IC, HEX INVERTERS, 74HCT04 IC-880

VR1 DIODE, ZENER 30V BZX84C30 DZ-106-30

VR2 DIODE, ZENER, REGULATOR DZ-120

Y1 CRYSTAL, FSM327 CR-41

IC-1080

IC-437